Q:

Write a C++ Program to Check a number is Prime or not

belongs to collection: C++ Number Solved Programs

Write a C++ Program to Check given number is Prime number or not. Here’s simple C++ Program to Check given number is Prime number or not in C++ Programming Language.

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. It means a prime number is only divisible by 1 and itself, and it start from 2. The smallest prime number is 2

Here is source code of the C++ Program to Check given number is Prime number or not. The C++ program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

SOURCE CODE : :

``````/*  C++ Program to Check given number is Prime number or not  */

#include<iostream>
using namespace std;

int main()
{
int i,n;

cout<<"Enter any positive number :: ";
cin>>n;

if(n==1)
{
cout<<"\nSmallest prime number is :: 2";
}

for(i=2;i<n;i++)
{
if(n%i==0)
{
cout<<"\nThe Entered Number [ "<<n<<" ] is NOT a prime number.\n";
break;
}
}

if(n==i)
{
cout<<"\nThe Entered Number [ "<<n<<" ] is a prime number.\n";
}

return 0;
}``````

Output : :

```/*  C++ Program to Check given number is Prime number or not  */

Enter any positive number :: 97

The Entered Number [ 97 ] is a prime number.

Process returned 0```

Above is the source code for C++ Program to Check given number is Prime number or not which is successfully compiled and run on Windows System.The Output of the program is shown above .