Function Reference
— Command: help name

Display the help text for name. If invoked without any arguments, help prints a list of all the available operators and functions.

For example, the command help help prints a short message describing the help command.

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.

See also: doc which lookfor