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### I.1 Keywords

The following identifiers are keywords, and may not be used as variable or function names:

`__FILE__` | `__LINE__` | `break`
`case` | `catch` | `classdef`
`continue` | `do` | `else`
`elseif` | `end` | `end_try_catch`
`end_unwind_protect` | `endclassdef` | `endenumeration`
`endevents` | `endfor` | `endfunction`
`endif` | `endmethods` | `endparfor`
`endproperties` | `endswitch` | `endwhile`
`enumeration` | `events` | `for`
`function` | `global` | `if`
`methods` | `otherwise` | `parfor`
`persistent` | `properties` | `return`
`switch` | `try` | `until`
`unwind_protect` | `unwind_protect_cleanup` | `while`

The function `iskeyword` can be used to quickly check whether an identifier is reserved by Octave.

Built-in Function: iskeyword ()
Built-in Function: iskeyword (name)

  Return true if name is an Octave keyword. If name is omitted, return a list of keywords.

  See also: isvarname, exist.