add: unfinished code. people are having problems

14-arrays/_experimental/_14-arrays/02-array-literals/01/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() {
+	ages := [3]int{15, 30, 25}
+
+	for _, age := range ages {
+		fmt.Println(age)
+	}
+}

14-arrays/_experimental/_14-arrays/02-array-literals/02-fixed-size/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
+
+func main() {
+	// uncomment the code below to observe the error
+
+	// ages := [3]int{15, 30, 25, 44}
+
+	// for _, age := range ages {
+	// 	fmt.Println(age)
+	// }
+}

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.

14-arrays/_experimental/_14-arrays/02-array-literals/04-element-type/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
+
+func main() {
+	// -----
+	// you cannot use incompatible values
+	// than the array's element type
+	//
+	// uncomment the code parts below one by one
+	// then observe the errors
+	// -----
+
+	// for example you can't use a string
+	// ages := [3]int{15, 30, "hi"}
+
+	// -----
+
+	// or a float64, etc...
+	// ages := [3]int{15, 30, 5.5}
+
+	// -----
+
+	// of course this is valid, since it's untyped
+	// 5. becomes 5 (int)
+	// ages := [3]int{15, 30, 5.}
+
+	// -----
+
+	// 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.

14-arrays/_experimental/_14-arrays/02-array-literals/05-ellipsis/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() {
+	ages := [...]int{15, 30, 25}
+	// equals to:
+	// ages := [3]int{15, 30, 25}
+
+	for _, age := range ages {
+		fmt.Println(age)
+	}
+}