Extrude Node and Direction in Dynamo

Hi All,

Newbie here (at least to Dynamo). Has anyone encountered the extrude node? I'm used to standard programming where variables are only one of several types (string, long, etc..) but dynamo doesn't appear to be explicit on what type of variable it my need for the inputs. The extrude node really has me stumped. I'm trying to extrude circle into a cylander, but I cannot figure out what the "direction" input requires.

Your helps is appreciated!


Dr. Emergence