add: if statement exercises

This commit is contained in:
Inanc Gumus
2018-10-27 17:40:20 +03:00
parent 12b09c3174
commit 1d1280d76b
22 changed files with 835 additions and 0 deletions

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@@ -0,0 +1,58 @@
// 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"
"strings"
"time"
)
func main() {
if len(os.Args) != 2 {
fmt.Println("Give me a month name")
return
}
// get the current year and find out whether it's a leap year
year := time.Now().Year()
leap := year%4 == 0 && (year%100 != 0 || year%400 == 0)
// setting it to 28, saves me typing it below again
days := 28
month := os.Args[1]
// case insensitive
if m := strings.ToLower(month); m == "april" ||
m == "june" ||
m == "september" ||
m == "november" {
days = 30
} else if m == "january" ||
m == "march" ||
m == "may" ||
m == "july" ||
m == "august" ||
m == "october" ||
m == "december" {
days = 31
} else if m == "february" {
// try a "logical and operator" above.
// like: `else if m == "february" && leap`
if leap {
days = 29
}
} else {
fmt.Printf("%q is not a month.\n", month)
return
}
fmt.Printf("%q has %d days.\n", month, days)
}