Returning a Value

Once a value has been copied into an invoked method (in the example, print()) the invoked method can use the copy or change the copy. But the changes do not affect the caller. How can a method send a value back to the caller? Examine the following:

class SimpleClassTwo
{
  public int twice( int x )
  {
    return 2*x;
  }
}

class SimpleTesterTwo
{
  public static void main ( String[] args )
  {
    int var = 7;
    int result = 0;

    SimpleClassTwo simple = new SimpleClassTwo();

    System.out.println("First  value of result: " + result );    
    result = simple.twice( var );
    System.out.println("Second value of result: " + result );    
  }
}

To return a single value to the caller, an invoked method can use the return statement along with the value to be returned.