40 lines
777 B
Go
40 lines
777 B
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"os"
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"strings"
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)
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const usage = `[command] [string]
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Available commands: lower, upper and title`
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func main() {
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args := os.Args
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if len(args) != 3 {
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fmt.Println(usage)
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return
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}
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cmd, str := args[1], args[2]
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switch cmd {
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case "lower":
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fmt.Println(strings.ToLower(str))
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case "upper":
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fmt.Println(strings.ToUpper(str))
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case "title":
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fmt.Println(strings.Title(str))
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default:
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fmt.Printf("Unknown command: %q\n", cmd)
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}
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}
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