Initial commit

12-switch/09-when-to-use/main.go

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+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Println("Gimme a month name.")
+		return
+	}
+
+	// m := os.Args[1]
+
+	// if m == "Dec" || m == "Jan" || m == "Feb" {
+	// 	fmt.Println("Winter")
+	// } else if m == "Mar" || m == "Apr" || m == "May" {
+	// 	fmt.Println("Spring")
+	// } else if m == "Jun" || m == "Jul" || m == "Aug" {
+	// 	fmt.Println("Summer")
+	// } else if m == "Sep" || m == "Oct" || m == "Nov" {
+	// 	fmt.Println("Fall")
+	// } else {
+	// 	fmt.Println("ERROR: not a month.")
+	// }
+
+	switch m := os.Args[1]; m {
+	case "Dec", "Jan", "Feb":
+		fmt.Println("Winter")
+	case "Mar", "Apr", "May":
+		fmt.Println("Spring")
+	case "Jun", "Jul", "Aug":
+		fmt.Println("Summer")
+	case "Sep", "Oct", "Nov":
+		fmt.Println("Fall")
+	default:
+		fmt.Printf("%q is not a month.\n", m)
+	}
+}