package main

import "fmt"

func swap(x *int, y *int) {
   var z int = *x;
   *x = *y;
   *y = z;
}

func swap2(x int, y int) (int, int) {
   return y, x;
}

func main() {
  x := 2;
  y := 3;

  swap(&x, &y);
  x, y = swap2(x, y);

  fmt.Println("x: ", x);
  fmt.Println("y: ", y);
}