go single chan

package main

import (
	"fmt"
	"time"
)

func sendData(sendch chan<- int) {
	fmt.Println("go sendData", sendch)
	sendch <- 10
	//<-sendch
}

func readData(sendch <-chan int) {
	//sendch <- 10
	data := <-sendch
	fmt.Println(data)
}

func main() {
	chnl := make(chan int)
	go sendData(chnl)
	//readData(chnl)

	go readData(chnl)
	time.Sleep(time.Second*6)
}