Let’s look at the “for loop” from the example: We first start by setting the variable i to 0. When the test expression is true, the flow of control enter the inner loop and codes inside the body of the inner loop is executed and updating statements are updated. Here, the main difference between a while loop and do while loop is that while loop check condition before iteration of the loop. The do while loop in the C language is basically a post tested loop and the execution of several parts of the statements can be repeated by the use of do-while loop. The do statement executes a statement or a block of statements while a specified Boolean expression evaluates to true.Because that expression is evaluated after each execution of the loop, a do-while loop executes one or more times. Notice that unlike the while loop, in do while a semicolon(;) is placed after the condition. C# while loop consists of a test-expression. play_arrow. while loops are used in situations where we do not know the exact number of iterations of loop beforehand. In the previous tutorial we learned for loop.In this guide we will learn while loop in C. Required fields are marked *, Copyright © 2012 – 2021 BeginnersBook . A do-while loop does exactly what its name proclaims. Here, 'a' is assigned a value 1. a<=10 → This is the condition which is evaluated. The only difference is that in do-while loop, the test condition is evaluated at the end of loop. The following program print numbers between 1 and 100 which are multiple of 3 using the do while loop: In line 5, we have declared and initialized variable i. The “do while loop” has the following form: do { do something; } while (expression); Do something first and then test if we have to continue. Simply, the outer do-while loop contains the inner do-while loop as a set of statements. In do-while loop, the test condition is evaluated at the end. In most computer programming languages, a do while loop is a control flow statement that executes a block of code at least once, and then either repeatedly executes the block, or stops executing it, depending on a given boolean condition at the end of the block.. Output 2. It will execute the group of statements inside the C Programming loop. This is where we start to count. Hope this tutorial has helped you to understand the main difference between while, do-while and for loop in C/C++ along with syntax and C programming example. Now practise solving coding questions using different loops. Do While Loop: This loop is similar to the while loop but here first the loop statements are executed and after that, the condition is checked. A do...while loop is similar to a while loop, except the fact that it is guaranteed to execute at least one time. C++ for loops C++ for loops C++ for loops . A do..while loop is almost the same as a while loop except that the loop body is guaranteed to execute at least once. While Loop. Then try to use a for(int x=0; x

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