Function fun

CodeChef_problems/POTATOES/Solution.cpp:8–17

#include <iostream>
using namespace std;
int fun(int f)
    {
        for(int j=2;j*j<=(f);j++) //this contains the Main Logic ; j is traversed till sqrt of f
        {   if(f%j==0)
            {
                return 0;
            }
        }
    return 1;
    }

int main()
{