Arrays in Go programming language

👋 Hi everyone and welcome...

In this article i'll explain arrays in go programming, let's start

Permalink💡 What is an Array?

Imagine that you have a library that contains multiple sections, let us call these sections rows and columns and you use these sections to store different types of books ( Historical, Science, etc) this is arrays in real life.

Permalink💡 Arrays in Go programming language

If we need to store a collection of data of the same type, like a list of color names. Such type of collection is stored in a program using an Array. An array is a fixed-length sequence that is used to store homogeneous elements in the memory.

Permalink💡 You can create

One-dimensional array.
Multidimensional arrays.

Permalink💡 What is a one-dimensional array?

You can think of a one-dimensional array as a row, where elements are stored one after another in a single row and multiple columns.

Permalink💡 What is a multidimensional array?

Multidimensional arrays in simple words as an array of arrays (multiple rows and columns).

Permalink💡 What is an array index?

Is the identity (Location) of stored data in your array always start from zero 0.

Permalink💡 To create Arrays

var fruits [3]string    // One Dimensional Array
var colors [2][3]string // Multidimensional Array

Permalink💡 To initialize an arrays

package main

import (
    "fmt"
)

func main() {

    var fruits [3]string    // One Dimensional Array
    var colors [2][3]string // Multidimensional Array

    fruits[0] = "Lemon"
    fruits[1] = "Avocado"
    fruits[2] = "Grape"

    fmt.Println("One Dimensional Array:", fruits)

    colors[0][0] = "Purple"
    colors[0][1] = "Red"
    colors[0][2] = "Green"
    colors[1][0] = "Yellow"
    colors[1][1] = "Black"
    colors[1][2] = "Orange"

    fmt.Println("Multidimensional Array:", colors)
}

// Output
// One Dimensional Array: [Lemon Avocado Grape]
// Multidimensional Array: [[Purple Red Green] [Yellow Black Orange]]

Permalink💡 Length of Arrays

To get length of arrays, strings, slices and maps use len() method, it start counting from one.

fmt.Println("Length of One Dimensional Array:", len(fruits))
fmt.Println("Length of Multidimensional Array:", len(colors))

Permalink💡 To print first item in One Dimensional and Multidimensional Array

fmt.Println("First Item:", fruits[0])
fmt.Println("First Item:", colors[0][0])

Permalink💡 To print first row in Multidimensional Array

fmt.Println("First Row:", colors[0])

Permalink💡 Use for loops to Print Arrays

for item := 0; item < len(fruits); item++ {
        fmt.Printf("Fruits %d : %s |", item, fruits[item])
}

//---------------------------------//

for row := 0; row < 2; row++ {
    for column := 0; column < 3; column++ {
        fmt.Println(colors[row][column])
    }
}

//---------------------------------//

for row := 0; row < len(colors); row++ {
    fmt.Printf("Row %d: ", row)

    for column := 0; column < len(colors[row]); column++ {
        fmt.Printf("%s, ", colors[row][column])
    }

    fmt.Println("")
}

Permalink💡 range()

range() Method helps you to loop over elements of array and Print them.

for id, value := range fruits {
    fmt.Println(id, "->", value)
}

//---------------------------------//

for index, value := range colors {
    fmt.Println(index, "->", value)

    for _, valInside := range colors[index] {
        fmt.Printf("%s ", valInside)
    }

    fmt.Println("")
}

That's it for today ...

I hope you gained something here today and reading it was worth the time.

Stay tuned for next articles Good Luck 😊.

Arrays in Go Programming

Basics of arrays in Go programming language