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# length

The `length` method returns the length of the match. You can also retrieve the length of sub matches by specifying the `submatch` parameter.

## Syntax

    length( [ submatch ] )

## Arguments

Argument | Description
--- | ---
`submatch` | (number) The sub match to return the length of, starting at 1 for the first sub match. With the default value of 0 the length of the whole match is returned.

## Returns

(Number). The length of the sub match.

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