JavaScript - Array join() Method

---

---

The JavaScript Array join() method is used to concatenate the array elements with a specified separator and returns the result as a string.

• If no separator is specified, the array elements will be separated by (,) comma by default.
• This method does not change the original array instead, it returns a new string as a result.
• If the array has only one item, then the value will be returned without a separator.

Syntax

Following is the syntax of JavaScript Array join() method −

array.join(separator);

Parameters

This method accepts only one parameter. The same is described below −

• The "separator" is a string that separates the elements in the resulting string. By default, it separated with (,) comma.

Return value

A string representing the elements of the array joined by the specified separator.

Examples

Example 1

If we do not pass any separator to the JavaScript Array copyWithin() method, it will separate the elements with (,) comma by default.

Output

As we can see the output, all the elements in the array are seperated with (,) comma.

Lion,Chetaah,Tiger,Elephant,Dinosaur

Example 2

Here, we are passing an empty string as a parameter to this function. So that, it will return the elements without a (,) comma and no space in between them −

Output

After executing the above program, the array elements will be separated with no space in between them.

LionChetaahTigerElephantDinosaur

Example 3

Here, we are passing "and" as a separator to this function. So that, the array elements will be separated by "and" −

Output

After executing the above program, the array elements will be separated by "and".

Lion and Chetaah and Tiger and Elephant and Dinosaur