How to convert array to string in javascript

Javascript method to convert array to string: 1. Use toString() method, syntax "arrayObject.toString()"; 2. Use join() method, syntax format "arrayObject.join(separator) )".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Method 1. Use toString()

toString() method can convert the array into a string and return the result.

Syntax

arrayObject.toString()

Return value

String representation of arrayObject. The return value is the same as the string returned by the join() method without parameters.

Example

<script type="text/javascript">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr.toString())
</script>

Output:

George,John,Thomas

Method 2, use join()

The join() method is used to put all elements in the array into a string.

Elements are separated by the specified delimiter.

Syntax

arrayObject.join(separator)

Parameters	Description
separator	Optional. Specify the delimiter to use. If this parameter is omitted, a comma is used as the delimiter.

Return value

Returns a string. The string is generated by converting each element of the arrayObject to a string and then concatenating the strings, inserting the separator string between the two elements.

Example

Example 1

In this example, we will create an array and put all its elements into a string:

<script type="text/javascript">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr.join())
</script>

Output:

George,John,Thomas

Example 2

In this example, we will use delimiter to separate the elements in the array:

<script type="text/javascript">
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
document.write(arr.join("."))
</script>

Output:

George.John.Thomas

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