JavaScript Code

JavaScript Array join()

Join Elements of Array in JavaScript

In JavaScript, Array.join() method is used to join elements of the array by a given separator.


  • array is an array of elements.
  • join is the array method name.
  • separator is an optional string value. default value is comma.

join() method joins the elements of the array with the given separator string, and returns the result as a string. join() method does not modify the original array.


1. Join the elements of the array fruits with '-' hyphen character as separator.

let fruits = ['apple', 'banana', 'cherry'];
let separator = '-';
output = fruits.join(separator);

2. Call join() method on fruits array with no separator passed.

let fruits = ['apple', 'banana', 'cherry'];
let output = fruits.join();

Since comma is the default separator, we get a comma separated elements in the resulting string.

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