Iteration and Iterative statements.

ITERATION IN C

According to Google: Iteration is the repetition of a process or utterance.

In a programming language Iteration stands for a repeating execution of a set of codes until desired condition is obtained.

Iteration is done through Iterative Statements. Iteration is also called Looping, which means doing a work again and again.

For better understanding of a loop, here is a Real world filmy example:

Remember the climax scene from Dr. Strange (2016) where Dr. Strange goes into space to bargain for Earth’s protection from Dormammu, in order to do so he starts an endless time loop which he won’t stop until dormammu accepts his demands and when Dormammu did so the loop stopped. Iteration works in same way, considering his approach as loop’s condition.

There are three Iterative statements which makes Iteration possible:

• For statements (loops).
•  While statements (loops).
•  Do-while statements (loops).

FOR LOOP AND WHILE LOOP:

They are Entry controlled loop. They allow code to execute statements until it meets the condition of termination.

SYNTAX: FOR LOOP

for ( initialization, condition, increment/decrements)

{

                        //statements

}

Example:

    

SYNTAX: WHILE LOOP

while (condition)

  {

                 //statements

                 Increment/decrement;
}

EXAMPLE:

DO-WHILE LOOP:

Exit controlled loops, the statements are executed first and then the condition is checked.

SYNTAX:

do{

//statements

increment/decrement;

}
while(condition);

EXAMPLE:


Keep  following for  programs using Loops