arrays.go

package main

import "fmt"

// Arrays details arrays in golang
func Arrays() {
	// Here we create an array a that will hold exactly 5 ints.
	// The type of elements and length are both part of the array’s type.
	// By default an array is zero-valued, which for ints means 0s.
	var a [5]int
	fmt.Println("emp:", a)

	// We can set a value at an index using the array[index] = value syntax,
	// and get a value with array[index].
	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))

	// Use this syntax to declare and initialize an array in one line.
	b := [5]int{1, 2, 3, 4, 5}
	fmt.Println("decl: ", b)

	// Array types are one-dimensional,
	// but you can compose types to build multi-dimensional data structures.
	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)
}