Category: Go

In this post, we will learn about array in go lang

In my previous tutorial, I have explained the installation of Go in windows. Please check out the below URL for that.
https://beginnersbug.com/install-go-lang-in-windows/

Arrays are basic in all programming languages which is used for data operations. We can have a collection of elements here.

Creating array in Go lang

Similar to other programming languages, we can create arrays with length and without length.

In the below example I created two arrays with indexes of 5 & 3 with the datatype of int and string

package main

// fmt package for user input & output
import "fmt"

// Main Method
func main() {
	// Creating an int array with index of 5
	var intarr = [5]int{10, 4, 6, 2, 12}
	// Creating an string array with index of 3
	var strarr = [3]string{"Iron Man", "Hulk", "Thor"}
	// Printing arrays
	fmt.Println(intarr)
	fmt.Println(strarr)
}

Output

[10 4 6 2 12]
[Iron Man Hulk Thor]

Printing index of array

In the below example, we will print the element based on the index value.
Here we are printing element at index intarr(1) & strarr(2)

package main

// fmt package for user input & output
import "fmt"

// Main Method
func main() {
	// Creating an int array with index of 5
	var intarr = [5]int{10, 4, 6, 2, 12}
	// Creating an string array with index of 3
	var strarr = [3]string{"Iron Man", "Hulk", "Thor"}
	// Printing arrays
	fmt.Println(intarr)
	fmt.Println(strarr)

	// Printing index of an array
	fmt.Println(intarr[1])
	fmt.Println(strarr[2])
}

Output

[10 4 6 2 12]
[Iron Man Hulk Thor]
4
Thor

Print length of array

The below snippet will show you to print the length of an array.
len() method is used to print the length of the array

package main

// fmt package for user input & output
import "fmt"

// Main Method
func main() {
	// Creating an int array with index of 5
	var intarr = [5]int{10, 4, 6, 2, 12}
	// Creating an string array with index of 3
	var strarr = [3]string{"Iron Man", "Hulk", "Thor"}
	// Printing arrays
	fmt.Println(intarr)
	fmt.Println(strarr)

	// Printing index of an array
	fmt.Println(intarr[1])
	fmt.Println(strarr[2])

	fmt.Println("Lenght of int array:", len(intarr))
	fmt.Println("Lenght of string array:", len(strarr))
}

Output

[10 4 6 2 12]
[Iron Man Hulk Thor]
4
Thor
Lenght of int array: 5
Lenght of string array: 3

Iterate array using for loop

Here we are printing each and every element with the help of for loop

package main

// fmt package for user input & output
import "fmt"

// Main Method
func main() {
	// Creating an int array with index of 5
	var intarr = [5]int{10, 4, 6, 2, 12}
	// Creating an string array with index of 3
	var strarr = [3]string{"Iron Man", "Hulk", "Thor"}
	// Printing arrays
	fmt.Println(intarr)
	fmt.Println(strarr)

	// Printing index of an array
	fmt.Println(intarr[1])
	fmt.Println(strarr[2])

	fmt.Println("Lenght of int array:", len(intarr))
	fmt.Println("Lenght of string array:", len(strarr))

	// Iterating array using for loop
	for i := 1; i < len(intarr); i++ {
		fmt.Print(intarr[i], " ")
	}
	fmt.Println()
	// Iterating array using for loop
	for i := 0; i < len(strarr); i++ {
		fmt.Print(strarr[i], " ")
	}

}

Output

[10 4 6 2 12]
[Iron Man Hulk Thor]
4
Thor
Lenght of int array: 5
Lenght of string array: 3
4 6 2 12 
Iron Man Hulk Thor

Go lang play

You can play with the array using their playgrounds also https://go.dev/tour/moretypes/6