Tag: array

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Go

array in go lang

array in go lang

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

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