join Method (Array) (JavaScript)

 

Adds all the elements of an array separated by the specified separator string.


arrayObj.join([separator]) 

arrayObj

Required. An Array object.

separator

Optional. A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.

If any element of the array is undefined or null, it is treated as an empty string.

Example

The following example illustrates the use of the join method.

var a, b;
a = new Array(0,1,2,3,4);
b = a.join("-");
document.write(b);

// Output:
// 0-1-2-3-4

Requirements

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

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