Function in Golang

PROGRAM:

package main

import "fmt"

/* take two integer as arguments and return integer value */
func sum1(a int, b int) int {
    return a + b
}

/* Compine variable and assign name for return variable */
func sum2(a, b int) (c int) {
    c = a + b
    return
}

/* Return multiple value from function */
func sum3(a, b int) (int, bool) {
    if a == 0 || b == 0 {
        return 0, false
    }
    c := a + b

    return c, true
}

func main() {
    out1 := sum1(10, 20)
    fmt.Println("Result of 'sum1' function - ", out1)

    out2 := sum2(15, 20)
    fmt.Println("Result of 'sum2' function - ", out2)

    out3, rc := sum3(5, 2)
    fmt.Println("Result of 'sum3' function - ", out3, "Status - ", rc)

    out3, rc = sum3(5, 0)
    fmt.Println("Result of 'sum3' function - ", out3, "Status - ", rc)

    /* ignore the return value using '_' */
    out3, _ = sum3(25, 10)
    fmt.Println("Result of 'sum3' function - ", out3)
}

OUTPUT:
Result of 'sum1' function -  30
Result of 'sum2' function -  35
Result of 'sum3' function -  7 Status -  true
Result of 'sum3' function -  0 Status -  false
Result of 'sum3' function -  35