add: constants exercises

10-constants/exercises/05-area/solution/main.go

@@ -0,0 +1,20 @@
+// 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"
+
+func main() {
+	// Make them typeless
+	const (
+		width  = 25
+		height = width * 2
+	)
+
+	fmt.Printf("area = %d\n", width*height)
+}