package main

import (
	"fmt"
	"os"
	"strconv"
)

var result float64

func main() {
	if len(os.Args) < 2 {
		fmt.Println("Usage: ./sum-args 1 2 3 4 5 6")
		os.Exit(1)
	}

	for i := 1; i < len(os.Args); i++ {
		sum, _ := strconv.Atoi(os.Args[i])
		result = result + float64(sum)
	}

	fmt.Printf("%v\n", result)
}