Go Channel

Introduction

Go Channels provide a way for two goroutines to communicate with each other and synchronize their execution.

Here is an example program using channels: 

package main /* www.j  ava2s .co  m*/

import ( 
    "fmt" 
    "time" 
) 

func pinger(c chan string) { 
    for i  := 0; ; i++ { 
        c <- "ping" 
    } 
} 

func printer(c chan string) { 
    for { 
        msg  := <- c 
        fmt.Println(msg) 
        time.Sleep(time.Second * 1) 
    } 
} 

func main() { 
    var c chan string = make(chan string) 

    go pinger(c) 
    go printer(c) 

    var input string 
    fmt.Scanln(&input) 
}

This program will print ping forever.

hit Enter to stop it.

A channel type is represented with the keyword chan followed by the type of the things that are passed on the channel.

The left arrow operator (<-) is used to send and receive messages on the channel.

c <- "ping" means send "ping".

msg := <- c means receive a message and store it in msg.




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