using System;
public class Program
{
static bool isPrime(int x) {
// bool is a boolean type that has value of true/false
// please implement this method
int i;
for (i=2; i< (x/2) + 1; i++){
if (x%i == 0)
return false;
}
return true;
public static void Main()
int x = 101;
bool prime = isPrime(x);
if (prime == true)
Console.WriteLine("{0} is a prime number.",x);
else Console.WriteLine("{0} is not a prime number.",x);
// please implement this program