Go - let's get going - Syntax Basics - Types(int, float64), Conversions, operations

Head First Go
楽天ブックス 紀伊國屋書店

開発環境

• macOS Mojave - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Go (プログラミング言語)

Head First Go (Jay McGavren(著)、O'Reilly Media)のChapter 1(let's get going - Syntax Basics)、Exercise(24)の解答を求めてみる。

コード

package main

import "fmt"

func main() {
 var price int = 100
 fmt.Println("Price is", price, "dollars.")

 var taxRate float64 = 0.08
 var tax float64 = float64(price) * taxRate
 fmt.Println("Tax is", tax, "dollars.")

 var total float64 = float64(price) + tax
 fmt.Println("Total cost is", total, "dollars.")

 var availableFunds int = 120
 fmt.Println(availableFunds, "dollars available.")
 fmt.Println("Within budget?", float64(availableFunds) > total)
}

入出力結果(Bash、cmd.exe(コマンドプロンプト)、Terminal)

$ go run sample4.go
Price is 100 dollars.
Tax is 8 dollars.
Total cost is 108 dollars.
120 dollars available.
Within budget? true
$