main.go 源码
// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials : https://learngoprogramming.com
// In-person training : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus
package main
import (
"fmt"
"time"
)
func main() {
// time.Now() gets the current time
// and in turn, .Hour() gets the current hour from it
// h := time.Now().Hour()
// fmt.Println("Current hour is", h)
switch h := time.Now().Hour(); {
case h >= 18: // 18 to 23
fmt.Println("good evening")
case h >= 12: // 12 to 18
fmt.Println("good afternoon")
case h >= 6: // 6 to 12
fmt.Println("good morning")
default: // 0 to 5
fmt.Println("good night")
}
// h is not available here
// it's bound to switch statement's block
// fmt.Println(h)
}
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