using System;
 
public class PrimeNumbers
 
{
	// Main method entry point
	public static void Main()
 
	{
		// declare variables
		// n starts at 2 as the first prime number
		// totalPrimeNumbers starts at 1 since 2 is a prime number
		// sumOfPrimes starts at 2 since 2 is the first prime number
		int n = 2, totalPrimeNumbers = 1, x;
		double sumOfPrimes = 2, average;
 
		// while loop when n <= 100
		while (n <= 100)
		{
			// test if n is prime
			for (x = 2; x < n; x++)
			{
				if ((n % x) != 0)
				{
					sumOfPrimes = sumOfPrimes + n;
					totalPrimeNumbers++;
					// change value of x to end for loop
					x = n + 1;
				}
			}
			// increase n by 1 to test next number
			n++;
		}
		// calculate average
		average = sumOfPrimes / totalPrimeNumbers;
		// display average
		Console.WriteLine("The average of all prime numbers between 1 and 100 is: {0}", average);
 
	}
}

using System;
 
public class PrimeNumbers
 
{
	// Main method entry point
	public static void Main()
 
	{
		// declare variables
		int n = 2, totalPrimeNumbers = 0, x;
		double sumOfPrimes = 0, average;
 
		// while loop when n <= 100
		while (n <= 100)
		{
			bool isPrime = true;
 
			// test if n is prime
			for (x = 2; x < n; x++)
			{
				if ((n % x) == 0)
				{
					isPrime = false;
					break;
				}
			}
 
			if (isPrime == true)
			{
				sumOfPrimes = sumOfPrimes + n;
				totalPrimeNumbers++;
			}
			n++;
		}
		average = sumOfPrimes / totalPrimeNumbers;
		Console.WriteLine("The average of all prime numbers between 1 and 100 is: {0}", average);
 
	}
}