add: unfinished code. people are having problems

14-arrays/_experimental/_14-arrays/02-array-literals/03-constant-expressions/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"
+
+func main() {
+	// you cannot use variables
+	// when setting the length of an array
+
+	// length := 3
+
+	// but, you can use constants and constant expressions
+	const length = 3 * 2
+
+	ages := [3 * 2]int{15, 30, 25}
+
+	for _, age := range ages {
+		fmt.Println(age)
+	}
+}
+
+// EXERCISE:
+//   Try to put the `length` constant
+//   in place of `3 * 2` above.
+
+// EXERCISE:
+//   Try to put the `length` variable
+//   in place of `3 * 2` above.
+//
+//   And observe the error.
+//
+//   To do that, you need comment-out
+//   the length constant first.