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

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() {
 price := 100
 fmt.Println("Price is", price, "dollars.")

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

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

 availableFunds := 120
 fmt.Println(availableFunds, "dollars available.")
 fmt.Println("Within badget?", total <= float64(availableFunds))
}

入出力結果(Bash、cmd(コマンドプロンプト)、Terminal)

$ go run sample3.go 
Price is 100 dollars.
Tax is 8 ollras.
Total cost is 108 dollars.
120 dollars available.
Within badget? true
$ go run sample3.go