We need to add a semicolon at the end of the while condition. We do not need to add a semicolon at the end of a while condition.

While loop allows initialization of counter variables before starting the body of a loop.ĭo while loop allows initialization of counter variables before and after starting the body of a loop. This loop will execute the statement(s) at least once, then the condition is checked.

It checks the condition first and then executes statement(s) Here is an important difference between While and Do While Loop: While Step 6) Statements that come after the loop body are executed While vs Do-While Loop: Difference Between Them Step 5) Next, if the test expression is false, the compiler executes the statements after the loop body Step 4) If the test expression is true, the compiler executes the body of do-while loop Step 3) The test expression or condition is evaluated Step 2) The body of do-while loop is executed Otherwise, the control is transferred out of the loop. If the condition is true, then it will again execute the body of a loop. After the body is executed, then it checks the condition. In the do-while loop, the body of a loop is always executed at least once. It is also called an exit-controlled loop. What is a Do-While Loop?Ī Do-while loop is similar to the while loop except that the condition is always executed after the body of a loop. In a while loop, if the condition is not true, then the body of a loop will not be executed, not even once. Once the condition becomes false, the control goes out of the loop. If it is true, the same process is executed until the condition becomes false. If a condition is true, then and only then the body of a loop is executed.Īfter the body of a loop is executed, the control again goes back to the beginning, and the condition is checked. In a while loop, a condition is evaluated before processing a body of the loop. What is While Loop?Ī While loop is the most straightforward looping structure. The purpose of the loop is to repeat the same code a number of times. The control statement is a combination of some conditions that direct the body of the loop to execute until the specified condition becomes false. A loop consists of two parts, a body of a loop and a control statement. A Loop executes the sequence of statements many times until the stated condition becomes false.

Conio library c++