Go by Example: Channel Buffering

By default channels are unbuffered, meaning that they will only accept sends (`chan <-`) if there is a corresponding receive (`<- chan`) ready to receive the sent value. Buffered channels accept a limited number of values without a corresponding receiver for those values.
	package main
	import "fmt"
	func main() {
Here we `make` a channel of strings buffering up to 2 values.	messages := make(chan string, 2)
Because this channel is buffered, we can send these values into the channel without a corresponding concurrent receive.	messages <- "buffered" messages <- "channel"
Later we can receive these two values as usual.	fmt.Println(<-messages) fmt.Println(<-messages) }

$ go run channel-buffering.go 
buffered
channel