# what

## Purpose

Directory listing of M-files, MAT-files, and MEX-files.

## Synopsis

    what
    what dirname

## Description

`what`, by itself, lists the M-files, MAT-files, and MEX-files in the current directory.

`what` `dirname` lists the files in directory `dirname` on MATLAB's search path. It is not necessary to enter the full pathname of the directory; the last component, or last couple of components, is sufficient.

## Examples

The commands

    what general

and

    what matlab/general

both list the M-files in the `general` directory. The syntax of the path depends on your operating system:

- UNIX:`matlab/general`
- VMS:`MATLAB.GENERAL`
- MS-DOS:`MATLAB\GENERAL`
- Macintosh:`MATLAB:General`

  ## See Also

      dir, lookfor, path, which, who

  (c) Copyright 1994 by The MathWorks, Inc.