Go by Example: Channel Buffering

Here’s an example that demonstrates channel buffering:

package main

import "fmt"

func main() {
    c := make(chan int, 2)
    c <- 1
    c <- 2
    fmt.Println(<-c)
    fmt.Println(<-c)
}

In this example, we create a channel c with a buffer size of 2. This means that c can store up to 2 values before blocking. We then send the values 1 and 2 to the channel, which are stored in the buffer.

Finally, we receive the two values from the channel and print them out. As the channel is buffered, the <-c statements do not block and the values are retrieved in the order they were sent.

Here’s another example to demonstrate channel buffering:

package main

import "fmt"

func main() {
    c := make(chan int, 3)
    go func() {
        for i := 1; i <= 3; i++ {
            c <- i
        }
        close(c)
    }()

    for v := range c {
        fmt.Println(v)
    }
}

In this example, we create a channel c with a buffer size of 3. We then create a goroutine that sends the values 1, 2 and 3 to the channel and then closes it.

Finally, we use a for range loop to receive the values from the channel and print them out. Since the channel is buffered, the values are retrieved from the buffer and not blocked.