static int ReturnAValue(int x)
{
  // We return the result of computing x * 10 back to the caller.
  // Notice how we are returning an int, which matches the method's return type.
  return x * 10;
}

static void Main()
{
  // We can use the returned value any way we want, such as storing it in a variable.
  int num = ReturnAValue(5);
  // Prints 50 to the console.
  Console.WriteLine(num);
}