sum_of_numbers_with_chan.go

package main

import "fmt"

var exampleNumbers = []int{1, 2, 3, 4, 5}

func sumOfNumbers(numbers []int) <-chan int {
	var result = make(chan int)
	go func(ch chan int) {
		defer close(ch)
		var sum int
		for _, number := range numbers {
			sum += number
		}
		ch <- sum
	}(result)
	return result
}

func main() {
	fmt.Println(<-sumOfNumbers(exampleNumbers))
}