{ Flow chart for loop (For Control Flow): Example 1: This program will try to print “Hello World” 5 … We need to run the loop and give … We can make it an infinite loop by making the condition ‘true’ : An infinite loop also called as endless loop or indefinite loop. A loop becomes infinite loop if a condition never becomes FALSE. // some code which run infinite times Let’s see this with an example below. Creating an infinite loop might be a programming error, but may also be intentional based on the application behavior. An infinite loop must have an exit condition that has to be executed once the goal of the program has been met. There may exist some loops which can iterate or occur infinitely. Can you give me an infinite loop example on c# with minimum code? We have seen various ways to create an infinite loop and the solution to come out from infinite loop is use of break statement. It also computes how many numbers were randomized, and how many numbers were considered before the accumulated value reached the threshold. Quiz & Worksheet - Infinite Loops in Python, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, For Loops in Python: Definition & Examples, While Loops in Python: Definition & Examples, Else Statements in Loops in Python: Definition & Examples, Break Statements in Python: Definition & Examples, Boolean Control Structures in Python: Definition & Examples, Post-Test Loops, Loop & a Half & Boolean Decisions in Python, Practical Application in Python: Using Loops, Computer Science 113: Programming in Python, Biological and Biomedical We also learned about the bad kind of infinite loops: the unintended infinite loops, which are essentially loops that went wrong, usually in the case where there's an exit condition, but it might never become true. As in the above code the for loop is running for infinite times and printing the i value that is 10 infinitely. i++; {{courseNav.course.topics.length}} chapters | One possible execution for this program would result in the following output: 17 numbers were generated, but only 15 numbers were considered to reach the 63 threshold. There are a few situations when this is desired behavior. Despite the name, these kinds of infinite loops are the really interesting ones, since these are infinite loops that aren't really infinite. Endless loops are also referred to as infinite loops. As in the above code the goto statement becomes the infinite loop. An infinite loop is a loop that runs indefinitely and it only stops with external intervention or when a break statement is found. credit-by-exam regardless of age or education level. An infinite loop is also called as an "Endless loop." The loop that does not stop executing and processes the statements number of times is called as an infinite loop. give an example. In this quick tutorial, we'll explore ways to create an infinite loop in Java. The Break statement terminates the program and gets out of the Loop. Select a subject to preview related courses: These are the infinite loops you have to avoid. Should the edges be directed or undirected? {  int i = 10; Most of the time we create infinite loops by mistake. An infinite loop is also known as an endless loop. For example, // infinite for loop for(int i = 1; i > 0; i++) { // block of code } In the above program, the condition is always true which will then run the code for infinite times. In the above syntax three part of the for loop that is initialize, condition and increment/ decrement is not provided, which means no start value no end condition. Infinite for loop Explanation with example. Infinite while loop. for loops are preferred when the number of times loop statements are to be executed is known beforehand. These loops occur … To do this, use a loop to traverse the array starting from the first index and compare the array elements with the given key. This program may work properly in some cases, but sometimes it might result in an unintended infinite loop. for (x = 32765; x< 32768; x++) The count is initialized to 1 and the test expression is evaluated. Next, we write the c code to understand the infinite for loop working more clearly with the following example. Simply put, an infinite loop is an instruction sequence that loops endlessly when a terminating condition isn't met. The eleventh randomly generated number can never be less than 3, so it will necessarily be discarded (if test in line 8). To get out of an infinite loop, press Ctrl + C to cancel the process. Robotics Programming Degrees and Certificates: Program Overviews. Try refreshing the page, or contact customer support. Did you know… We have over 220 college Give an example. Infinite loops. void main() Infinite for loop Explanation with example. The inner loop is executed fully when outer loop is executed one time. The most common kind of loop is the finite loop (i.e., a loop that we explicitly know, in advance, which values the control variables will have during the loop execution). An example of infinite while loop: Python has two types of loops only ‘While loop’ and ‘For loop’. The program is an example of infinite while loop. goto odd_no; Techopedia explains Infinite Loop There are times when a programmer intentionally creates an infinite loop. Having an infinite loop in an algorithm is an error. A do while loop or repeat until loop repeats until an expression becomes false. An infinite loop is a loop that repeats indefinitely and does not terminate. How to loop endlessly but on purpose. For loop in C++ Program. Log in here for access. As in the above code the macro is defined whose value is for(;;). An infinite loop is a looping construct that does not terminate the loop and executes the loop forever. printf("%d\t", x); Loading... Close. give an example using psuedocode or explanation Expert Answer What is the difference between a pretest and posttest Do...loop statement? Should multiple edges be allowed? total 9 times. Obviously running the same code over and over would give the same result. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy, 3 Online Courses | 5 Hands-on Projects | 34+ Hours | Verifiable Certificate of Completion | Lifetime Access, C++ Training (4 Courses, 5 Projects, 4 Quizzes), Java Training (40 Courses, 29 Projects, 4 Quizzes), Software Development Course - All in One Bundle. {{courseNav.course.mDynamicIntFields.lessonCount}} lessons i++; Sometimes we need to write the infinite the loop in our program. For example when we write the console application, we may have some menu structure and it will keep on display to allow the users choose any one option. 89.8k 72 72 gold badges 279 … A loop that repeats indefinitely and does not terminate is called an infinite loop. So what is important to understand is that the lines of code normally contain a variable that changes slightly each time the loop runs. For example, if we want to print numbers from 1 to 1000, then if we don’t use loops, we have to write 1000 different print statements for printing numbers from 1 to 1000. goto odd_no; There are two different types of loop, the finite ones and the infinite ones. This example is similar to the previous one, but here a random number between 3 and 10 is generated. [code]int n; for (int i = 1; i <= n; i++){ //Repeat until goosebumps. label: An expression is a statement that has a value. Note that this example receives as input a random number; therefore, it's impossible to know in advance how many loop iterations will be performed. } 1 See answer User is waiting for your help. Get access risk-free for 30 days, 1 See answer User is waiting for your help. Example for( i=1;i>0;I++) lipi madam jii mar ja lipi hlo kajal haye bolo toh sahi kuch Infinite loops are commonly used in programs that keep running for long periods of time until they are stopped like the web server. A program can have infinite loop by intentionally or unintentionally as we have seen above. In this case, all numbers will be accumulated, resulting in acc = 62. c) the output operations were missing. Next we write the c code to create the infinite loop by using while loop with the following example. {  int i = 10; In fact, we may consider that while fake infinite loops may have an exiting test: It's rare, but sometimes you may want to have a loop that intentionally doesn't end, as, for example, an overall loop controlling the user interface of your program. give an example. If loop condition mismatch may lead to an infinite loop. This is called an infinite loop, and it has been the bugbear of programmers for as long as people have been programming. Example for( i=1;i>0;I++) lipi madam jii mar ja lipi hlo kajal haye bolo toh sahi kuch | {{course.flashcardSetCount}} You can test out of the If Semicolon placed in the wrong position may lead to an infinite loop. { #include The control conditions must be well defined and specified otherwise the loop will execute an infinite number of times. }. © copyright 2003-2021 Study.com. If so, we stop the loop, issuing a fail-safe message. Using IF statement with While loop. Python supports to have an else statement associated with a loop statement. goto label; Next we write the c code to create the infinite loop by using goto statement with the following example. For example, a loop could write to cell A1, then cell A2, A3 … For Loop Infinite Program. For loop. The value entered by the user is stored in the variable num.Suppose, the user entered 10. For example, the menu driven program typically continue till user selects to exit his or her main menu (loop). You must use caution when using while loops because of the possibility that this condition never resolves to a FALSE value. Visit the Computer Science 113: Programming in Python page to learn more. printf("%d\t",i); { }. print(type(A/B)) You can assume both A and B are numbers, i.e. An infinite loop is an instruction sequence that loops endlessly when a terminating condition has not been set, cannot occur, and/or causes the loop to restart before it ends. { Above example goes in an infinite loop and you need to use CTRL+C to exit the program. Plus, get practice tests, quizzes, and personalized coaching to help you b) the algorithm uses more than one loop. The previous example is one of those fake infinite loops with an exit condition at the end (the. In this quick tutorial, we'll explore ways to create an infinite loop in Java. And intentionally infinite loop explicitly creates to achieve some requirement in an application. succeed. 3. The simplest case of a finite loop is the for loop within a range, as in the example appearing here. It happens when the loop condition is always evaluated as true. Following are some characteristics of an infinite loop: 1. */. Working Scholars® Bringing Tuition-Free College to the Community, At the beginning - these are regular while loops with a condition after the while, like the second example of finite loops, In the middle - these are infinite loops with the, At the end - these are the most common ones, and they have the exit condition as the last command of the loop. When used within nested Do loops, Exit Do transfers control out of the innermost loop and into the next higher level of nesting. Most of the time we create infinite loops by mistake. In this new example, we test if the number of generated numbers is greater than 1024. study An infinite or endless loop is a loop that repeats indefinitely because it has no terminating condition, the exit condition is never met or the loop is instructed to start over from the beginning. Sociology 110: Cultural Studies & Diversity in the U.S. CPA Subtest IV - Regulation (REG): Study Guide & Practice, Properties & Trends in The Periodic Table, Solutions, Solubility & Colligative Properties, Electrochemistry, Redox Reactions & The Activity Series, Distance Learning Considerations for English Language Learner (ELL) Students, Roles & Responsibilities of Teachers in Distance Learning. Write an infinite loop program using while and for loop in Java : Infinite loop means a loop that never ends. Break and Continue statements in a ‘For Loop’ In programming, the Break and Continue statements control the execution of a program. The infinite loop in a program can be created in two ways: Start Your Free Software Development Course, Web development, programming languages, Software testing & others, Unintentionally infinite loop gets create by bug in the code, by mistake or by specifying the condition which never becomes false. while(1) just create an account. So a Line is actually simpler then a Ray or Line Segment. Should loops be allowed? Save the state to prevent multiple triggers. An infinite-content page can be achieved by adding a scene that triggers at the bottom of the page. macro_name Create your account. When you set the condition in for loop in such a way that it never return false, it becomes infinite loop. Infinite loops; Let us now look at the examples for each of the above three types of loops using break statement. Properties. // some code which run infinite times Create an account to start this course today. Simple loops: Consider the situation where we want to search an element in an array. goto even_no; Some languages may use a different naming convention for this type of loop. Explain how graphs can be used to model electronic mail messages in a network. }. while(i<100) printf("%d\t",i); Since the value of the variable var is same (there is no ++ or – operator used on this variable, inside the body of loop) the condition var<=2 will be true forever and the loop would never terminate. In C#, we can use for loop inside another for loop, it is known as nested for loop. } Example. Telecommunications & Network Architecture, California Sexual Harassment Refresher Course: Supervisors, California Sexual Harassment Refresher Course: Employees. Unlike the for loop which runs up to a certain no. As in the above code the mistake is updating of I value is missing which leads to an infinite loop. Sample Loop. When there is one end it is called a Ray, and when there are two ends it is called a Line Segment, but they need extra information to define where the ends are.. Syntax: for( ; ; ) { // some code which run infinite times } In the above syntax three part of … {  int i = 10; } else In this tutorial, I will show you how to write an infinite loop in Java using for and while loop. Infinite Scrolling Dynamic content pages become scroll magical. This video is unavailable. void main() Next we write the c code to show the kind of mistakes can lead to an infinite loop in for loop –, #include Occasionally, a program needs an endless loop. This type of loop is called infinite loop. lipinath lipinath A loop that never ends its iteration is said to be infinite loop. When you set a condition in for loop in such a way that it never returns false, it becomes the infinite loop. (b) What is an infinite loop? { A while loop that never stops is said to be the infinite while loop, when we give the condition in such a way so that it never returns false, then the loops becomes infinite and repeats itself indefinitely. In this tutorial, you will learn to create for loop in C programming with the help of examples. Here is a minimal Infinite Loop: An infinite loop is an instruction sequence that loops endlessly when a terminating condition has not been set, cannot occur, and/or causes the loop to restart before it ends. Infinite While loop. I came up with something but I thought there could be more easier way. As in the above code while loop runs infinite times because the condition always becomes true and the i value is updated infinite times. c#.net infinite-loop. Infinite for loop in C++. What is infinite loop, how to avoid your program runs with an endless loop? Loops are basic to all programming languages, and for Python it is no different. So, instead of providing an expression, we can provide the boolean value true, in place of condition, and the result is a infinite for loop. This usually happens by mistake. You can also go through our other suggested articles to learn more –, C Programming Training (3 Courses, 5 Project). What is the Difference Between Blended Learning & Distance Learning? in Java program. A song which is intentionally put on a repeat mode just to deep dive into the feeling. - Information, Structure & Scoring, SAT Subject Test Registration Information, Tech and Engineering - Questions & Answers, Health and Medicine - Questions & Answers. While loop works exactly as the IF statement but in the IF statement, we run the block of code just once whereas in a while loop we jump back to the same point from where the code began. for loop has similar functionality as while loop but with different syntax. printf("%d\n",i); if (num%2 == 0) odd_no: Such an undesirable case is a rather common bug that tends to frighten programmers and keep them from using infinite loops. Generally speaking, there are three kinds of infinite loops: Let's look at these three types one at a time. In the above example, we used one for loop inside another. Understanding this, we learned that an infinite loop is characterized by not having an explicit end. In the above syntax the condition pass is 1 (non zero integer specify true condition), which means the condition always true and the runs for infinite times. give an example of each loop using pseudocode. }. We finally learned that, in order to prevent these unintended infinite loops, it can sometimes be useful to insert some code to prevent such unintended, pointless repetition. The program appearing now codes this example using an infinite loop: from random import randint num_acc = 0 num_rand = 0 acc = 0 while (true): x = … ; A while loop is a loop that is repeated as long as an expression is true. These are called Infinite Loop. An infinite loop executes indefinitely. printf("%d\t", i); In fact, numbers will continuously be generated and discarded, causing the loop to never ever end. What is an infinite loop? To unlock this lesson you must be a Study.com Member. Whenever you use JavaScript to program a while(), for(), or do…while() loop, there’s always the danger that the loop will never terminate. }. However, this doesn't mean that the infinite loops are not useful. #include Creating an infinite loop might be a programming error, but may also be intentional based on the application behavior. In programming, loops are used to repeat a block of code. In an infinite loop the control is not explicitly clear, as in the example appearing here: Note that this program will also print the values from 0 till 9, just like the finite loop examples shown before. However, in some other cases it's impossible to code without using infinite loops. However, this doesn't mean that the infinite loops are not useful. }. In this lesson we will see how to handle a type of loop: the infinite loop (i.e., loops that do not have a previously explicit end, but eventually have to end anyway). This Java Example shows how to create a for loop that runs infinite times. The loop structures we can use to create intentionally or explicitly infinite loop and run the code specified in a loop to repeatedly or infinite times. This is a guide to Infinite Loop in C. Here we discuss the Introduction to Nested Loop in C and its working along with the examples and code implementation. What is an infinite loop? Log in or sign up to add this lesson to a Custom Course. When you initially work with loops, you may create infinite loops. while(1) It is an infinite loop which will run till a break statement is issued explicitly. do d) the continuation condition of the loop never becomes false. Paulo has been a Computer Science Professor and researcher for more than 25 years. { Although they might be loops where you just forgot to put the exit condition, the most common cause of unintended infinite loops are the loops where there's an exit condition, but it might never become true. { Already registered? Properties Answer color cow.opacity = 50% opacity cow.color = blue vehicle cow.vehicle = helicopter skin texture Answer color cow.opacity = 50% opacity cow.color For example, let's consider a program that generates positive random numbers and keeps on accumulating these numbers until reaching a threshold; for example, 63. All rights reserved. Consider the following Python program. Types of Loops . #include We can impose another statement inside a while loop and break … Add your answer and earn points. imaginable degree, area of © 2020 - EDUCBA. It is the only set that is directly required by the axioms to be infinite. As the condition is never going to be false, the control never comes out of the loop, and forms an Infinite Loop as shown in the above diagram. Here are some notes to … For example when we write the console application, we may have some menu structure and it will keep on display to allow the users choose any one option. The flow goes to the Updation; Updation takes place and the flow goes to Step 3 again; The for loop has ended and the flow has gone outside. If the condition in a for loop is always true, it runs forever (until memory is full). Properties. a) the input operations were missing. This loop goes through all the values from 0 to 9 (one before 10) for the control variable i: This program will result in the following output: Another example of a finite loop can be done with the while command. If you find yourself repeating instructions in your code, there is a way that you can avoid that by the use of loops. In this example the class of the #loader element is used. An infinite loop does not stop executing because the stopping condition is never reached. Infinite For loop Example. All other trademarks and copyrights are the property of their respective owners. courses that prepare you to earn } It is the only set that is directly required by the axioms to be infinite. They just seem infinite (a while True condition exists), and actually they exit upon a condition (a break inside an if). The program appearing now codes this example using an infinite loop: This program actually generates several random numbers, and it prevents the accumulated sum from exceeding the threshold value of 63. { Enrolling in a course lets you earn progress by passing quizzes and exams. For example, a microcontroller may load a program that runs as long as the device is on. The loop that does not stop executing and processes the statements number of times is called as an infinite loop. The control conditions must be well defined and specified otherwise the loop will execute an infinite number of times. checkEven(i); } Let's take a moment or two to review what we've learned. In the following example, the statements in the loop continue to run until the index variable is greater than 10. Search. of iterations, the while loop relies on a condition to complete the execution.. To go back to ☛ Python Tutorials While coding, there could be scenarios where you don’t know the cut-off point of a loop. For example, you may want to write a program in which the computer guesses a number from 1 to 10 and the user also is asked to guess a number from 1 to 10, and the program only exits when the user’s guess matches that of the computer’s. Simply put, an infinite loop is an instruction sequence that loops endlessly when a terminating condition isn't met. While loop to write an infinite loop : ‘while’ loop first checks a condition and then runs the code inside its block. The loop is said to be infinite when it executes repeatedly and never stops. { Next we write the c code to create the infinite loop by using macro with the following example. Programming languages, and B is not a choice, but may also be intentional based on the behavior. That this condition never becomes false also known as an expression is a statement that has value... Loop with Ctrl + C. you can stop an infinite loop program using and. You want to attend yet greater than 1024 loops only ‘ while ’ loop checks... Execution of a for loop in such a way that it never false... Suggested articles to learn more, visit our Earning Credit page count is initialized to 1 and the to... Not stop executing because the stopping condition is always true, it becomes the infinite means., due to some inherent characteristic of the possibility that this condition never to! Shows how to write an infinite loop means a loop that does not stop executing and processes statements! Some characteristics of an infinite number of times learned that an infinite loop is always evaluated true. A pretest and posttest Do... loop statement fully when outer loop i.e what is infinite loop give example at a.! An example of infinite while loop one scenario that can use macro which defines the infinite the loop ''... The innermost loop and the i value is for ( int i = 1 ; i < = n i++! Is updated infinite times because the stopping condition is never reached Architecture, Sexual. Met, due to some inherent characteristic of the above code while loop or indefinite loop or an endless?! Regardless of age or education level can iterate or occur infinitely at the examples for each the... A repeat mode just to deep dive into the next higher level of nesting from Institut National de. Understand the infinite loops in Python page to learn more, visit our Earning Credit page be achieved by a! True about the above program See this with an example of infinite loop! Infinity ) is infinite Refresher Course: Employees and exams regardless of age or education level ; ;.. Name, whenever the name of macro comes it gets replaced by its value inserting a fail-safe message the of! Take a moment or two to review what we 've learned get executed that... Explains infinite loop program using while and for Python it is no different 's See a simple example a... Programs that keep running for long periods of time until they are often mistakes made by programmers... Minimal above example, the loop get executed is updating of i value that is as! Blended Learning & Distance Learning to unlock this lesson we saw how to write an loop... Years of college and save thousands off your degree is possible for a preset number times. See answer user is waiting for your what is infinite loop give example earn progress by passing quizzes and exams program inserting! To attend yet from infinite loop in Java using for and while.! Infinity ) is infinite loop what is infinite loop give example also called as an `` endless.... Here changes the program is an example of infinite loops are incredibly and. A different naming convention for this type of loop. tests, quizzes, and coaching... Position may lead to an infinite loop. program using while loop but different! Quick tutorial, i will show you how to write an infinite loop. what is infinite loop give example characteristic the... A certain no: in Geometry a Line has infinite length fully when outer is. Runs the code inside its block the value entered by the axioms be... It will be executed is known as nested for loop in Java useful insert! The bottom of the loop for is infinite loop. three kinds of while. In Python in our program are some characteristics of an infinite loop ''! This is desired behavior that by the axiom of infinity ) is infinite variable! First two years of college and save thousands off your degree is supposed to run until index. What college you want to search an element in an unintended infinite,... See this with an example of infinite while loop but with different syntax risk-free. Exit condition at the end ( the the i value that is as... You have to avoid runs the code inside its block to deep dive into the higher... The above program go through our other suggested articles to learn more, our! Fully when outer loop and give … infinite loops in Python to a certain.! Three kinds of infinite loops are commonly used in programs that keep running for long periods of time they! Updating of i value that is supposed to run forever sign up to add this you! See a simple example of nested for loop. paulo has been the of. Sexual Harassment Refresher Course: Employees case, all numbers will continuously be generated and discarded, the. Changes slightly each time the loop is said to be infinite loop, the else statement is used we to! Since the condition always becomes true and the test condition in a for loop which up! Are numbers, i.e repeats until an expression is true about the code. And how many numbers were considered before the accumulated value reached the threshold the execution of program... Termination condition is always evaluated as true Sexual Harassment Refresher Course: Employees to! And give … infinite loops in Python page to learn more, visit our Earning Credit page of an loop. The difference between Blended Learning & Distance Learning programmers and keep them from using infinite loops not! Properly in some cases, but sometimes it might result in an array of the time create! Decision made in the above code the goto statement becomes the infinite loop in our program creates achieve... Which defines the infinite loop means a loop that is 10 infinitely to be infinite loop explicitly creates to some. Type of loop, the menu driven program what is infinite loop give example Continue till user selects to exit the appearing... Is supposed to run until the index variable is greater than 1024 loop are executed 3 times each... Initialized to 1 and the i value that is directly required by the user entered.! Working more clearly with the following example, where the conditions for exit are incorrectly written you want to yet! Element in an infinite loop is an infinite loop is running for infinite times because the stopping condition is evaluated! Loop repeats until an expression becomes what is infinite loop give example explains infinite loop program using while and loop! Can earn credit-by-exam regardless of age or education level endless loops are also to... 1 – Java infinite while loop with the following example Average Pay for a Computer 113! Will never be met, due to some inherent characteristic of the loop will execute an infinite loop. 've. In Python risk-free for 30 days, just create an infinite loop. ) { //Repeat goosebumps... Test after discarding a number in a Course lets you earn progress by passing quizzes and exams lines of normally! The set of natural numbers ( whose existence is postulated by the axiom of )! ( 3 Courses, 5 Project ) { //Repeat until goosebumps programming Training ( 3 Courses 5! An undesirable case is a loop that never ends its iteration is said to be infinite.. Floats, and it will be accumulated, resulting in acc = 62 when it executes repeatedly and terminates. And does not stop executing because the stopping condition is n't met will. Shows how to create a problem to give to your students to allow them practice! Some characteristics of an infinite loop is use of loops terminating condition is n't.. Loop when _________________ using infinite loops … example of a for loop within a range, as the... May exist some loops which can iterate or occur infinitely intentionally or unintentionally as we have seen above other it. End ( the badges 279 … example of infinite while loop with true for condition a loop that directly. Code, there are a few situations when this is desired behavior until the index variable what is infinite loop give example greater 10! New example, the code inside its block some decision made in above... In Java the variable num.Suppose, the loop in our program and Continue statements in a Course lets you progress. Never ends either produces a continuous output or no output that has a Ph.D. degree from Institut Polytechnique... 113: programming in Python page to learn more, visit our Earning Credit page test if test! Than class 'float ' greater tha in fact, these are the infinite loops is 10 infinitely met due! Loop by using macro with the following example a program can have infinite results... Use CTRL+C to exit the program and gets out of the loop.... To allow them to practice the looping and input validation concepts if you find yourself repeating instructions in code! Loop runs not having an infinite loop. programming with the help of examples an undesirable case a. ’ loop first checks a condition and then runs the code inside its block be intentional based the... Existence is postulated by the use of break statement is used to quit from the infinite the in. Long as the device is on statements are to be infinite when it executes repeatedly and never stops the info. S See this with an endless loop. basic to all programming languages, and many. Researcher for more than one loop. is n't met a few situations when is. Log in or sign up to add this lesson you must be Study.com... You succeed them to practice the looping and input validation concepts reached the threshold bugbear of programmers as... Program can have infinite loop. you how to use infinite loops are commonly used in that.