Initial commit

08-numbers-and-strings/01-numbers/exercises/09-capstone3/main.go

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+// 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"
+)
+
+// ---------------------------------------------------------
+// EXERCISE
+//  1. Get the radius from the command-line
+//  2. Convert it to a float64
+//  3. Calculate the volume of a sphere
+//
+// SPHERE VOLUME FORMULA
+//  https://en.wikipedia.org/wiki/Sphere#Enclosed_volume
+//
+// RESTRICTION
+//  Use `math.Pow` to calculate the volume
+//
+// EXPECTED OUTPUT
+//  4188.79
+// ---------------------------------------------------------
+
+func main() {
+	var radius, vol float64
+
+	// ADD YOUR CODE HERE
+	// ...
+
+	// DO NOT TOUCH THIS
+	fmt.Printf("radius: %g -> volume: %.2f\n", radius, vol)
+}

08-numbers-and-strings/01-numbers/exercises/09-capstone3/solution/main.go

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+// 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"
+	"strconv"
+)
+
+func main() {
+	var radius, vol float64
+
+	radius, _ = strconv.ParseFloat(os.Args[1], 64)
+
+	vol = (4 * math.Pi * math.Pow(radius, 3)) / 3
+
+	fmt.Printf("radius: %g -> volume: %.2f\n", radius, vol)
+}