// specific length.

​

package main

​

import "fmt"

​

func main() {

​

    // Here we create an array `a` that will hold exactly

    // 5 `int`s. The type of elements and length are both

    // part of the array's type. By default an array is

    // zero-valued, which for `int`s means `0`s.

    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("dcl:", 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)

}

​