_Added in 1.9.4_

*$alias(N/filename)*

Returns the filename for the Nth loaded alias file or if you specify a filename, it returns [[$null]] if the file is not loaded.

*Parameters*

N/filename - Nth alias or alias filename.

*Example*

<pre>
;Print number of alias files.
//echo -ag $alias(0)

;Print first alias file.
//echo -ag $alias(1)

;Check if foo.txt is loaded.
//echo -ag foo.txt is $iif($alias(foo.txt),loaded, not loaded)
</pre>