Do While Loop
Last modified by Microchip on 2023/11/09 09:06
Unlike for and while loops, which test the loop condition at the top of the loop, the do…while loop in C programming language checks its condition at the bottom of the loop.
A do…while loop is similar to a while loop, except that a do…while loop is guaranteed to execute at least one time.
Syntax
do statement while (expression)
The statement is executed and then the expression is evaluated to determine whether or not to execute statement again. The statement will always execute at least once, even if the expression is false when the loop starts
1 int i = 0; //Loop counter initialized outside of loop
2
3 do
4 {
5 printf("Loop iteration %d\n", i++); //(i++) Loop counter incremented manually inside loop
6 } while (i < 5); //Condition checked at end of loop iterations
2
3 do
4 {
5 printf("Loop iteration %d\n", i++); //(i++) Loop counter incremented manually inside loop
6 } while (i < 5); //Condition checked at end of loop iterations
The expected output for this loop is:
Loop iteration 0
Loop iteration 1
Loop iteration 2
Loop iteration 3
Loop iteration 4
Loop iteration 1
Loop iteration 2
Loop iteration 3
Loop iteration 4
