using System;
public class Program
{
public static void Main()
int y;
y = Factorial(10);
Console.WriteLine("y={0}", y);
}
public static int ADD(int a, int b)
int c = a + b;
return c;
public static int Multi(int a, int b)
int c = a *b;
public static int Function(int x)
int y= Multi(2,x);
y= y + 4;
return y;
public static int Pow(int x, int i)
int r = x;
while (i > 1)
x = x * r;
i = i -1;
return x;
public static int Factorial(int x)
int i = x -1;
while (i> 0)
x = x * i;