====== concat ======

The function concat () assembles any number of strings.

==== Syntax: ====

<code>concat('string1', 'string2', 'string3', ...)</code>
returns: string1string2string3

==== Sample: ====

<code>concat('000', @SupplierGLN)</code> 
Here, the SupplierGLN is preceded by three zeros.