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Command: help
Octave's help command can be used to print brief usage-style messages, or to display information directly from an on-line version of the printed manual, using the GNU Info browser. If invoked without any arguments, help prints a list of all the available operators, functions, and built-in variables. If the first argument is -i, the help command searches the index of the on-line version of this manual for the given topics.

For example, the command

help help

prints a short message describing the help command, and

help -i help

starts the GNU Info browser at this node in the on-line version of the manual.

See section Using Info, for complete details about how to use the GNU Info browser to read the on-line version of the manual.

The help command can give you information about operators, but not the comma and semicolons that are used as command separators. To get help for those, you must type help comma or help semicolon.

Built-in Variable: INFO_FILE
The variable INFO_FILE names the location of the Octave info file. The default value is "/usr/local/info/octave.info".

Built-in Variable: INFO_PROGRAM
The variable INFO_PROGRAM names the info program to run. Its initial value is /usr/local/libexec/octave/VERSION/exec/ARCH/info, but that value can be overridden by the environment variable OCTAVE_INFO_PROGRAM, or the command line argument --info-program NAME, or by setting the value of INFO_PROGRAM in a startup script.

Built-in Variable: suppress_verbose_help_message
If the value of suppress_verbose_help_message is nonzero, Octave will not add additional help information to the end of the output from the help command and usage messages for built-in commands.

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