[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [ATypedArrayTuple](./rc-js-util.atypedarraytuple.md) > [join](./rc-js-util.atypedarraytuple.join.md) ## ATypedArrayTuple.join() method Adds all the elements of an array separated by the specified separator string. **Signature:** ```typescript join(_separator?: string): string; ``` ## Parameters

Parameter	Type	Description
\_separator	string	_(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.

**Returns:** string