How to create a string by joining the elements of an array in JavaScript ?

Given an array containing array elements and here we will join all the array elements to make a single string. To join the array elements we use arr.join() method.

There are two methods by which we can create a string by joining the elements of an array:

Using arr.join() Method

This method is used to join the elements of an array into a string. The elements of the string will be separated by a specified separator and its default value is a comma(,).

Syntax:

array.join(separator)

Example: In this case, we use an empty separator i.e. array.join("") to join the array elements.

let str = ["Welcome", "Geeks", "for", "Geeks"];

console.log("Joined String: " + str.join(""));

Joined String: WelcomeGeeksforGeeks

Using arr.toString() Method

The JavaScript Array toString() Method returns the string representation of the array elements

Syntax:

arr.toString()

Example:

// JavaScript to illustrate toString() method
function func() {

    // Original array
    let arr = ["Geeks", "for", "Geeks"];

    // Creating a string
    let str = arr.toString();
    console.log(str);
}
func();

Geeks,for,Geeks

Using for loop

A for loop iterates over each element of an array, appending them to a string with specified separators. It joins elements into a single string.

Example: In this example we iterates through an array, concatenating its elements into a string with spaces between them.

let array = ["Welcome", "to", "geeksForGeeks"];
let string = "";
for (let i = 0; i < array.length; i++) {
    string += array[i];
    if (i < array.length - 1) {
        string += " ";
    }
}
console.log(string);

Welcome to geeksForGeeks