cpp program to check prime number

here is a a program for checking that the number entered is prime number or not? 

i basically use repl.it for online coding you can also use it is very simple to use and very user friendly thanks and have a look

#include <iostream>
using namespace std;
int main()
{
  int n,count,j;
  cin>>n;
  for(j=2;j<n;j++)
    {
    
     
      if(n%j==0)
      {
      
        count=1;
        break;
      }

    }
    if(count==0)
    {
      cout<<"prime number";
    }
    else
    {
      cout<<"not prime";
    }
}

Output 

check that the number entered is a prime number or not?

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