[gradsusr] Meaning of "FUNCTION MAIN(args)"

[Guisseppe Arturo Vasq.]

Hi, all
 
I'm new in grads and i was looking for some scripts to make my own scripts, but i have a problem i don't know how to interpret "FUNCTION MAIN(args)" .... what does it want to say? ..... anyone could explain me with some examples.... 

thank so much

Guisseppe Vasquez V.
Agraria University, Lima-Peru
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