package main

import "fmt"

func fib(n int, ch chan<- int) {
    x, y := 0, 1    
    for i := 0; i < n; i++ {
        ch <- x
        x, y = y, x+y       
    }
}

func main() {

    // create an unbuffered channel
    ch := make(chan int) 

    // generate the first 10 Fibonacci numbers 
    // in a separate goroutine
    go fib(10, ch) 

    // read values from the channel until it's closed
    for i := 0; i < 10; i++ {        
        fmt.Println(<-ch)
    }
}