Golang 코루틴을 사용하여 통신하는 방법은 무엇입니까?

ch := make(chan T)

ch <- data

data := <-ch

package main

import (
    "fmt"
    "sync"
)

func sum(a []int, ch chan int) {
    sum := 0
    for _, v := range a {
        sum += v
    }
    ch <- sum
}

func main() {
    a := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
    ch := make(chan int)

    var wg sync.WaitGroup
    for i := 0; i < 5; i++ {
        start := i * 2
        end := start + 2
        wg.Add(1)
        go sum(a[start:end], ch)
    }

    go func() {
        for i := 0; i < 5; i++ {
            total := <-ch
            fmt.Println("Partial sum:", total)
        }
        wg.Done()
    }()

    wg.Wait()
}