package main

import "fmt"
import "sync"

func main() {
    ch := make(chan []int, 4)
    var m []int

    var wg sync.WaitGroup
    for i := 0; i < 5; i++ {
        wg.Add(1)
        go func() {
            defer wg.Done()
            ch <- m
            return
        }()
    }
    wg.Wait()

    for c := range ch {
        fmt.Printf("c is %v", c)
    }
}

ch := make(chan []int, 5)
...
wg.Wait()
close(ch)

func main() {
    ch := make(chan []int, 4)
    var m []int

    var wg sync.WaitGroup
    for i := 0; i < 5; i++ {
        wg.Add(1)
        go func() {
            ch <- m
            return
        }()
    }
    go func() {
        for c := range ch {
            fmt.Printf("c is %vn", c)
            wg.Done()
        }
    }()
    wg.Wait()
}

ch := make(chan []int, 5)

close(ch)

func main() {
    ch := make(chan []int, 4) // No matter which int number
    var m []int
    for i := 0; i < 5; i++ {
        go func() {
            ch <- m
            return
        }()
    }
    for c := range ch {
        fmt.Printf("c is %v n", c)
    }
}