go notes

go_notes.txt

Note return type on end of function:
func add(x int, y int) int {
    return x + y
}

Can be shortened to:
func add(x, y int) int {
    return x + y
}

Can return tuples:
func swap(x, y string) (string, string) {
    return y, x
}

Works out which vars to return by naming:
func split(sum int) (x, y int) {
    x = sum * 4 / 9
    y = sum - x
    return
}

Constants:
const Pi = 3.14

For loop. No () allowed. {} required (horay). [also with if]
sum := 1
for i := 0; i < 10; i++ {
   sum += i
}

For is also While
sum := 1
for sum < 1000 {
  sum += sum
}
fmt.Println(sum)

Variable scope bound by {}