🚀 go-pugleaf

Problem:	I am exporting postscript to another program. My code
		evaluates a Postscript variable "V1" that under
		certain conditions is defined by the importing program
		and under other conditions is not.

		So sometimes I get the error:
		
		" V1 undefined " 

		from the interpreter.


Is there a way to:  

		-Check to see if V1 is defined 

		-if it is defined, do nothing.

		-if it is not defined, then define it.


		Thanks,
				Tom