restructure: arrays and slices

16-slices/01-slices-vs-arrays/main.go

@@ -0,0 +1,30 @@
+// 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() {
+	{
+		// its length is part of its type
+		var nums [5]int
+		fmt.Printf("nums array: %#v\n", nums)
+	}
+
+	{
+		// its length is not part of its type
+		var nums []int
+		fmt.Printf("nums slice: %#v\n", nums)
+
+		fmt.Printf("len(nums) : %d\n", len(nums))
+
+		// won't work: the slice is nil.
+		// fmt.Printf("nums[0]: %d\n", nums[0])
+		// fmt.Printf("nums[1]: %d\n", nums[1])
+	}
+}