Difference Between while and do-while Loop

In this post, we will understand the difference between the ‘while’ loop and the ‘do-while’ loop.

while condition

The controlling condition here appears at the beginning of the loop.
The iterations do not occur if the condition at the first iteration results in False.
It is also known as an entry-controlled loop
There is no condition at the end of the loop.
It doesn’t need to execute at least one.

while ( condition){
   statements;
   //body of loop
}

Following is the flowchart of while loop −

The controlling condition is present at the end of the loop.
The condition is executed at least once even if the condition computes to false during the first iteration.
It is also known as an exit-controlled loop
There is a condition at the end of the loop.

do {
   statements;
   // body of loop.
}
while( Condition );

Following is the flowchart of do-while loop −

Published on 24-Mar-2021 18:39:22