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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     int n, i, count = 0;
  7.  
  8.     cout << "Enter a number: ";
  9.     cin >> n;
  10.  
  11.     for(i = 1; i <= n; i++)
  12.     {
  13.         if(n % i == 0)
  14.         {
  15.             count++;
  16.         }
  17.     }
  18.  
  19.     if(count == 2)
  20.     {
  21.         cout << "The number is prime.";
  22.     }
  23.     else
  24.     {
  25.         cout << "The number is not prime.";
  26.     }
  27.  
  28.     return 0;
  29. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
51
stdout 
Enter a number: The number is not prime.
https://ideone.com/WcuY9B
language:
C++ (gcc 8.3)
created:
8 hours ago
visibility:
public

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