CODE EXAMPLE FOR CPP

C++ prime number

// A optimized school method based C++ program to check
// if a number is prime
#include <bits/stdc++.h>
using namespace std;
  
bool isPrime(int n)
{
    // Corner cases
    if (n <= 1)
        return false;
    if (n <= 3)
        return true;
  
    // This is checked so that we can skip
    // middle five numbers in below loop
    if (n % 2 == 0 || n % 3 == 0)
        return false;
  
    for (int i = 5; i * i <= n; i = i + 6)
        if (n % i == 0 || n % (i + 2) == 0)
            return false;
  
    return true;
}
  
// Driver Program to test above function
int main()
{
    isPrime(11) ? cout << " true
" : cout << " false
";
    isPrime(15) ? cout << " true
" : cout << " false
";
    return 0;
}