C++ Program to Check Whether a 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. Let us start by understanding what is a prime number.

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.

To understand the following program, you should have a basic idea about the following topics in C++ programming.


Check Prime Number in C++

The program takes a user input for a number that needed to be checked for prime number. Since 0 and 1 are not prime numbers so we first check them using the if statement. And if the number is other than 0 and 1 the execution control goes to the else part of the statement.

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

Output:

Enter a positive integer: 13
13 is a prime number

You may go through the following program of prime numbers in C++.


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