The JavaScript Array join() 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);

Parameters

This method accepts a single parameter as mentioned above and described below:

• separator: It is Optional i.e., it can be either used as a parameter or not. Its default value is a comma(, ).

Example 1: In this example, the function join() joins together the elements of the array into a string using ‘|’.

function func() {
    let a = [1, 2, 3, 4, 5, 6];
    console.log(a.join('|'));
}
func();

1|2|3|4|5|6

Example 2: In this example, the function join() joins together the elements of the array into a string using ‘, ‘ since it is the default value.

let a = [1, 2, 3, 4, 5, 6];
console.log(a.join()); 

1,2,3,4,5,6

Example 3: In this example, the function join() joins together the elements of the array into a string using ‘ ‘ (empty string).

let a = [1, 2, 3, 4, 5, 6];
console.log(a.join(''));

123456

We have a complete list of JavaScript Array methods, to check those please go through this Javascript Array Complete reference article.

Supported Browsers:

• Google Chrome
• Edge
• Firefox
• Opera
• Safari