while loop in c programming language

 while loop in the C programming language

In computer programming languages there is a concept of control flow statements. In control flow statements we specify some conditions and based on those conditions whether they are true or false we run some iterative piece of code if the condition is true and terminate the control statement if the condition is false. 

There are mainly three types of control flow statements that we use in our programs to get the desired result, these three types of control statements are

Three types of Control flow statements

1) do-while loop

2) while loop

3) for loop

In today's post, we will discuss the while loop control statement. while loop is also known as a pre-tested loop in which before running the piece of code the condition is examined first. If the condition is true only then the while loop will execute and if the condition is false then the while loop statement terminates.

In these control statements, the piece of code is iterated according to the given condition. Now let us look at the syntax of the while loop statement. Below is the syntax of the while loop in c programming.

Syntax of while loop in c program

while(condition)

{

// code to be executed 

}

An expression is given in a while loop if the expression is true code repeats multiple times unless that condition becomes false. Now let us look at the simple example of the while loop. Below is the while loop example,

Explanation of the above coding example

In this while loop example program we simply declared an integer variable with constant value 1. After declaring and initializing this variable we are going to use this variable within the while expression and check for a condition that if the variable number has a value less or equal to 10 while(number<=10) than the given lines of code within curly brackets will repeat or iterate until number is less or equal to 10. At the end of this coding block, we are going to increment or add 1 in this number variable with each iteration until the number becomes equal to 10 and at that point, the while loop will terminate.

Congratulations as always, we did it again, we have successfully executed the while loop in C++ program.