Buffered Channel

A buffered channel can hold a small value before it is received.

buffered_channel.go

package main

import "fmt"

func main() {
	var second = 
	queue := make(chan string, 2)

	queue <- "red"
	queue <- second

	firstOut := <-queue
	secondOut := <-queue
	fmt.Println("first=", firstOut)
	fmt.Println("second=", secondOut)
	fmt.Println("capacity=", cap(queue))
}

package main

import "fmt"

func main() {
	var second = 
	queue := make(chan string, 2)

	queue <- "red"
	queue <- second

	firstOut := <-queue
	secondOut := <-queue
	fmt.Println("first=", firstOut)
	fmt.Println("second=", secondOut)
	fmt.Println("capacity=", cap(queue))
}

package main

import "fmt"

func main() {
	var second = 
	queue := make(chan string, 2)

	queue <- "red"
	queue <- second

	firstOut := <-queue
	secondOut := <-queue
	fmt.Println("first=", firstOut)
	fmt.Println("second=", secondOut)
	fmt.Println("capacity=", cap(queue))
}

buffered channel A buffered channel can act as a deterministic handoff queue when its capacity is large enough.