JavaScript Array join() Method
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JavaScript Array join() Method
The join() method creates and returns a new string by concatenating all of the elements in an array (or an array-like object), separated by commas or a specified separator string.
Note: This method will not change the original array.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
var myNumber = [1, 2, 3, 4, 5, 6, 7];
document.write(myNumber.join() +"<br>");
// join array elements with nothing
document.write(myNumber.join("") +"<br>");
// join array elements with underscore
document.write(myNumber.join("_"));
</script>
</body>
</html>
Syntax
Array.join(separator)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| separator | Optional | Specifies a string to separate each pair of adjacent elements of the array. If separator is not specified, the default value is "-" (Hyphen). |
Return Values
| Value | Explanation |
|---|---|
| string | A new string by concatenating all of the elements in an array separated by commas or a specified separator string. |
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