Array in Golang

PROGRAM - 1:

package main

import "fmt"

func main() {
    /* create array of size 5 */
    var a [5]int
    a[0] = 1
    a[2] = 3

    /* print 3rd value alone */
    fmt.Println(a[2])

    /* Print whole array */
    fmt.Println(a)
}

OUTPUT:
3
[1 0 3 0 0]

PROGRAM - 2:

package main

import "fmt"

func main() {
    /* create array of size 5 and initialize it*/
    var arr1 = [5]int{10, 20, 30, 40, 50}
    /* loop over array */
    for i := 0; i < 5; i++ {
        fmt.Println("Index - ", i, " Value - ", arr1[i])
    }
    fmt.Println("")

    arr2 := [5]int{2, 4, 6, 8, 10}
    /* 'len' statement gives size of array */
    for i := 0; i < len(arr2); i++ {
        fmt.Println("Index - ", i, " Value - ", arr2[i])
    }
    fmt.Println("")

    /* go automatically count the size of array */
    arr3 := [...]int{5, 10, 15, 20, 25}
    /* here 'i' will get index and val will get 'arr[i]' using 'range' keyword */
    for i, val := range arr3 {
        fmt.Println("Index - ", i, " Value - ", val)
    }
}

OUTPUT:

Index -  0  Value -  10

Index -  1  Value -  20

Index -  2  Value -  30

Index -  3  Value -  40

Index -  4  Value -  50

Index -  0  Value -  2

Index -  1  Value -  4

Index -  2  Value -  6

Index -  3  Value -  8

Index -  4  Value -  10

Index -  0  Value -  5

Index -  1  Value -  10

Index -  2  Value -  15

Index -  3  Value -  20

Index -  4  Value -  25