go channel waitgroup

package main

import (
	"fmt"
	"runtime"
)

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())

	c := make(chan bool,10)
	for i:=0; i<10; i++ {
		go Go(c,i)
	}

	for i:=0; i<10;i++ {
		<- c
	}
}

func Go(c chan bool, index int) {
	a := 1;

	for i:=0; i<1000000;i++ {
		a += i
	}

	fmt.Println(index, a)


	c <- true

}

package main

import (
	"fmt"
	"runtime"
	"sync"
)

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())

	wg := sync.WaitGroup{}
	wg.Add(10)
	c := make(chan bool,10)
	for i:=0; i<10; i++ {
		go Go(&wg,i)
	}

	wg.Wait()
}

func Go(wg *sync.WaitGroup, index int) {
	a := 1;

	for i:=0; i<1000000;i++ {
		a += i
	}

	fmt.Println(index, a)


	wg.Done()

}