Go Brain Teasers

Puzzle 16

What’s in a Channel?

chan.go

package main

import (
        "fmt"
)

func main() {
        ch := make(chan int, 2)
        ch <- 1
        ch <- 2
        <-ch
        close(ch)
        a := <-ch
        b := <-ch
        fmt.Println(a, b)
}

Guess the Output
	Try to guess what the output is before moving to the next page.

This code will print: 2 0

ch is a buffered channel with a capacity of 2 (you can check this with cap(ch)). You send two values to ch, 1 and 2. If you try ...