add: constants exercises

10-constants/exercises/02-remove-the-magic/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: Remove the Magic
+//
+//  Get rid of the magic numbers in the following code.
+//
+// RESTRICTIONS
+//  1. You should declare 3 constants named:
+//       hoursInDay, daysInWeek, and hoursPerWeek
+//
+//  2. And, hoursPerWeek constant should be initialized
+//     using hoursInDay and daysInWeek constants.
+//
+// EXPECTED OUTPUT
+//  There are 840 hours in 5 weeks.
+// ---------------------------------------------------------
+
+func main() {
+	fmt.Printf("There are %d hours in %d weeks.\n",
+		24*7*5, 5)
+}