using System;
public class Program
{
public static void NumDoublerPRINT (int num)
Console.WriteLine(num*2);
}
public static int NumDoublerRETURN ( int num )
return (num*2);
public static void Main(string[] args)
int b = 9;
NumDoublerPRINT(3);
NumDoublerPRINT(7);
NumDoublerPRINT(b);
Console.WriteLine(b);
Console.WriteLine( NumDoublerRETURN(5) );
b=NumDoublerRETURN (b);
