Go - Variadic Function

 

package main

import "fmt"

func main() {
    numbers := []int{1, 10, 15}
    sum := sumup(1, 10, 15, 40, -5)
    anotherSum := sumup(1, numbers...)

    fmt.Println(sum)
    fmt.Println(anotherSum)
}

func sumup(startingValue int, numbers ...int) int {
    sum := startingValue

    for _, val := range numbers {
        sum += val // sum = sum + val
    }

    return sum
}