C: 8. Loops

The looping can be defined as repeating the same process multiple times until a specific condition satisfies. C programming language provides the following types of loops to handle looping requirements:- 

while loop

The while loop in c is to be used in the scenario where we don't know the number of iterations in advance. It tests the condition before executing the loop body.

Syntax:-

while(condition){  

//code to be executed  

}      

Exercises:- 

1. Write a C program to print all natural numbers from 1 to n.
2. Write a C program to print all even numbers between 1 to 100.

do-while loop

It works the same as while loop except it executes once even the given condition fails.

Syntax:- 

do{  

//code to be executed  

}while(condition);   

Exercises:- 

1. Write a C program to print all natural numbers in reverse (from n to 1).

for loop

The for loop is also called as a per-tested loop. It is better to use for loop if the number of iteration is known in advance.

Syntax:- 

for(initialization;condition;incr/decr){  

//code to be executed  

}  

Exercises:- 

1. Write a C program to print multiplication table of any number.
2. Write a C program to calculate factorial of a number.
3. Write a C program to check whether a number is Prime number or not.