else - execute command if a condition is not met
==========================================

Synopsis
--------

if CONDITION; COMMANDS_TRUE...; [else; COMMANDS_FALSE...;] end


Description
------------

`if` will execute the command `CONDITION`. If the condition's exit status is 0, the commands `COMMANDS_TRUE` will execute. If it is not 0 and `else` is given, `COMMANDS_FALSE` will be executed.


Example
------------

The following code tests whether a file `foo.txt` exists as a regular file.



::

    if test -f foo.txt
        echo foo.txt exists
    else
        echo foo.txt does not exist
    end