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30 lines
488 B
Go
30 lines
488 B
Go
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// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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// See page 244.
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// Countdown implements the countdown for a rocket launch.
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package main
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import (
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"fmt"
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"time"
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)
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//!+
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func main() {
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fmt.Println("Commencing countdown.")
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tick := time.Tick(1 * time.Second)
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for countdown := 10; countdown > 0; countdown-- {
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fmt.Println(countdown)
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<-tick
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}
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launch()
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}
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//!-
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func launch() {
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fmt.Println("Lift off!")
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}
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