C Program to Check Whether a Given Number is Prime or Not1 min read

In this C programming example, we will learn about the Prime Number program in C. We specifically write a program to check the entered number is prime or not.

Prime Number:

A Prime Number is a number that is only divisible by 1 and itself. Example: 2, 3, 5, 7, 11, 13, 17, etc. These numbers are only divisible by 1 and the number itself.

Note:
0 and 1 is not a prime number and 2 is the only even and smallest prime number.

You must know the following topics in C first:


C Program to Check Whether a Given Number is Prime or Not

Output:

//Run 1
Enter the number: 13
13 is a prime number.

//Run2
Enter the number: 1
1 is not a prime number.

You may go through the following C program on the prime number.


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