st: returning value from a program

["Patrick McElduff" <Patrick.McElduff@hnehealth.nsw.gov.au>]

I want to write a  program that has two arguements and returns a value so that I can use it in the form:

generate temp = program(var1 var2)

I have written the guts of the program to do the work but I don't know how to get the input and output in the form I want.

Could you please tell me where I should start looking.

Thanks
Patrick


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