add: constants exercises

10-constants/exercises/09-iota-seasons/solution/main.go

@@ -0,0 +1,21 @@
+// 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() {
+	const (
+		Spring = (iota + 1) * 3
+		Summer
+		Fall
+		Winter
+	)
+
+	fmt.Println(Winter, Spring, Summer, Fall)
+}