You are looking at many info about multivars

Multivar allows quick creation/updating of variables.

syntax:
multiset $variable=value,$variable2=value2;

You must delimit each var with commas
You must enclose string values in single quotes
You can not use values directly from an object eg $actor's class
You can use variables as the value

An example:

multivar $bing='this command',$bong="run by [$actor]",$bang=$loc,$bung=2;
print "$bing $bong in [$bang] not [$bung]";