59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
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//
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// 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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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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"time"
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)
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func main() {
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if len(os.Args) != 2 {
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fmt.Println("Give me a month name")
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return
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}
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// get the current year and find out whether it's a leap year
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year := time.Now().Year()
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leap := year%4 == 0 && (year%100 != 0 || year%400 == 0)
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// setting it to 28, saves me typing it below again
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days := 28
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month := os.Args[1]
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// case insensitive
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if m := strings.ToLower(month); m == "april" ||
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m == "june" ||
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m == "september" ||
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m == "november" {
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days = 30
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} else if m == "january" ||
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m == "march" ||
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m == "may" ||
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m == "july" ||
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m == "august" ||
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m == "october" ||
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m == "december" {
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days = 31
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} else if m == "february" {
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// try a "logical and operator" above.
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// like: `else if m == "february" && leap`
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if leap {
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days = 29
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}
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} else {
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fmt.Printf("%q is not a month.\n", month)
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return
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}
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fmt.Printf("%q has %d days.\n", month, days)
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}
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