In above diagram, if the body of a loop contains a break; statement then the loop will break. In the above diagram if a condition is always true then control can never come outsite the loop body and we say those kind of loops as an infinite loop. There are 5 types of loops in C as listed below. To handle such types of statements some flow controls required. These flow controls are called Control Statements In other words, the control statements are used to control the cursor in a program according to the condition or according to the requirement in a loop. There are mainly three types of control statements or flow controls.

An Exit Control Loop checks the condition for exit and if given condition for exit evaluate to true, control will exit from the loop body else control will enter again into the loop.
Such type of loop controls exit of the loop that’s why it is called exit control loop.

Do…While loop:

What Is Looping Statement In C Programming

Do …while loop is an exit control loop.
It is a variation of while loop.
When we want to execute or perform some task at least for once, we can use do…while loop structure.
In a while loop if the expression becomes false at very first try then loop will never be executed.
Since, do…while is of type exit control loop it checks the condition at last so, first time the loop will be execute unconditionally.
If the condition for the exit becomes true then loop will be terminate otherwise it will be executed for the next time.
It has the following form:

Syntax:

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What Is Looping Statement In C Format

The main difference between while loop and do… while is as follow.

While loop	Do…while loop
It is an entry control loop.	It is an exit control loop.
In while loop expression/condition is checked at the time of entry.	In do… while loop condition is checked at the time of exit.
It does not have semicolon (;) at the end of the expression.	In do while loop semicolon (;) at the end of the expression is compulsory.
Syntax: while(condition) { // loop body }	do { // loop body } while(condition);
Example: while(i<=5) { printf(“n%d”,i); i++; }	do { printf(“n%d”,i); i++; } while(i<=5) ;

What Is Looping Statement In C Diff

The following program demonstrates use of do…while loop to perform basic operations.

What Is Looping Statement In C++