# lookfor

Search for keyword in reference page text

## Syntax

``lookfor keyword``
``lookfor keyword -all``

## Description

example

````lookfor keyword` searches for the specified keyword in the summary line of all the references pages in the MathWorks® documentation. For all references pages in which a match occurs, `lookfor` displays a link to the help text for that page and the H1 line.```

example

````lookfor keyword -all` searches the summary line and the Syntax, Description, Input Arguments, Output Arguments, and See Also sections of each reference page. For all references pages in which a match occurs, `lookfor` displays a link to the help text for that page and the individual lines in which a match occurs.```

## Examples

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Search for the word `inverse` in the summary line of all the references pages in the MathWorks documentation.

`lookfor inverse`
```acos - Inverse cosine in radians acosd - Inverse cosine in degrees acosh - Inverse hyperbolic cosine acot - Inverse cotangent in radians acotd - Inverse cotangent in degrees acoth - Inverse hyperbolic cotangent acsc - Inverse cosecant in radians acscd - Inverse cosecant in degrees acsch - Inverse hyperbolic cosecant ...```

Search for the word `inverse` in the summary line and the Syntax, Description, Input Arguments, Output Arguments, and See Also sections of all the reference pages in the MathWorks documentation.

`lookfor inverse -all`
```acos: acos - Inverse cosine in radians This MATLAB function returns the Inverse Cosine (cos-1) of the elements Inverse Cosine of Value Inverse Cosine of Vector of Complex Values Plot Inverse Cosine Function acosd: acosd - Inverse cosine in degrees This MATLAB function returns the inverse cosine (cos-1) of the elements Inverse Cosine of 0 acosh: acosh - Inverse hyperbolic cosine This MATLAB function returns the inverse hyperbolic cosine of the Inverse Hyperbolic Cosine of Vector Plot the Inverse Hyperbolic Cosine Function ...```

## Input Arguments

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Keyword to search for, specified as a character vector or string scalar.

## Alternative Functionality

As an alternative to the `lookfor` command, use the find features in the Current Folder browser. For example, you can look for all occurrences of a specified word in all the MATLAB® program files in the current folder and its subfolders. For more information, see Find Files and Folders.

To search the documentation including third-party and custom documentation, use the `docsearch` function.

## Version History

Introduced before R2006a

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