The only difference is that in do-while loop, the test condition is evaluated at the end of loop. #include #include void main () { int i = 1,a = 0; do { a = a + i; i++; } while (i <= 10); printf ("Sum of 1 to 10 is %d",a); getch (); } Its output should be something like this-. The condition of the loop is tested before the body of the loop is executed, hence it is called an entry-controlled loop.. Using the do-while loop, we can repeat the execution of several parts of the statements. The main use of the do-while loop is there is a need to execute the loop at least once. Any of the following C statements used as part of the loop_body_statement can alter the flow of control in a do while statement: do while loop in C. The do while loop is a post tested loop. This process goes on until the test expression becomes false. Do while Loop in C++ Example | C++ Do-while Loop Program is today’s topic. This process keeps repeating as long as the value of i is less than 100. Required fields are marked *, Copyright © 2012 – 2021 BeginnersBook . First the block of code is executed then the conditional expression is evaluated. 2. I searched online and I found several examples even on different programming languages, for example, (PHP) Do-While Loop with Multiple Conditions, (Python) How to do while loops with multiple conditions, (C++) Using multiple conditions in a do…while loop, etc. The do/while loop is a variant of the while loop. The idea of declaration is to show the compiler, that the variable name present is not garbage but is actually a variable. edit close. It will execute the group of statements inside the C Programming loop. eval(ez_write_tag([[250,250],'overiq_com-medrectangle-4','ezslot_6',136,'0','0'])); Before we leave do while loop, let’s take one more example. The while keyword is used to create while loop in C#. If you want to test the termination condition at the end of the loop, then the do-while loop is used. The syntax of C while loop is as follows: 1. It is similar to a while statement but here condition is checked after the execution of statements. Flow diagram – Nested do wile loop How to work Nested do while loop. Here, the main difference between a while loop and do while loop is that while loop check condition before iteration of the loop. 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. Simply, the outer do-while loop contains the inner do-while loop as a set of statements. ; Next, we have to use Increment and Decrement operators inside the loop … A do..while loop is almost the same as a while loop except that the loop body is guaranteed to execute at least once. C# while loop consists of a test-expression. do while loop. If … ; Next, we have to use Increment and Decrement operators inside the loop … The do keyword is placed on a line of code at the top of the loop. Furthermore, the while loop is known as the entry-controlled loop. Privacy Policy . A block of statements follows it with a test expression after the keyword while, at the bottom of the loop. Let's say you want to create a program to find the factorial of a number. Next >> Syntax of do while do { statements; }while(expression); do while loop has similar behavior as while loop but it has one difference. 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 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. do-while-loop in C-Programing <