package main

import "fmt"

func main() {

	// Arrays in Go have a fixed size and a specific type.
	var a [5]int
	fmt.Println("emp:", a)

	// Set and get a value.
	a[4] = 100
	fmt.Println("set:", a)
	fmt.Println("get:", a[4])

	// The builtin len returns the length of an array.
	fmt.Println("len:", len(a))

	// Array literals
	b := [5]int{1, 2, 3, 4, 5}
	fmt.Println("dcl:", b)

	// An array literal with [...] can be used to let the compiler count the array elements.
	b = [...]int{1, 2, 3, 4, 5}
	fmt.Println("dcl:", b)

	// Array literals with an index can initialize the specified values and any unspecified
	// values will be set to the zero value of the array's element type.
	b = [...]int{100, 3: 400, 500}
	fmt.Println("idx:", b)

	// Multidimensional arrays
	var twoD [2][3]int
	for i := 0; i < 2; i++ {
		for j := 0; j < 3; j++ {
			twoD[i][j] = i + j
		}
	}
	fmt.Println("2d: ", twoD)

	// Array literals for multidimensional arrays
	twoD = [2][3]int{
		{1, 2, 3},
		{1, 2, 3},
		// The comma is required here, even though it's the last element.
		// This helps make diffs cleaner when new elements are added.
	}
	fmt.Println("2d: ", twoD)
}