36 lines
650 B
Go
36 lines
650 B
Go
// 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"
|
|
"math"
|
|
"os"
|
|
"path"
|
|
"strconv"
|
|
)
|
|
|
|
func main() {
|
|
var radius, area float64
|
|
|
|
radius, _ = strconv.ParseFloat(os.Args[1], 64)
|
|
|
|
area = 4 * math.Pi * math.Pow(radius, 2)
|
|
// area := 4 * math.Pi * math.Pow(radius, 2)
|
|
|
|
fmt.Printf("radius: %g -> area: %.2f\n",
|
|
radius, area)
|
|
|
|
dir, _ := path.Split("secret/file.txt")
|
|
fmt.Println(dir)
|
|
|
|
color, color2 := "red", "blue"
|
|
color, color2 = color2, color
|
|
fmt.Println(color, color2)
|
|
}
|