Find First and First Difference in Progress 4GL

[Suganthar]

I'm not clear about below queries and curious to know what is the different between them even though both retrieves same results. (Database used sports2000).

FOR EACH Customer WHERE State = "NH",
FIRST Order OF Customer:
DISPLAY Customer.Cust-Num NAME Order-Num Order-Date.
END.

FOR EACH Customer WHERE State = "NH":
FIND FIRST Order OF Customer NO-ERROR.
IF AVAILABLE Order THEN
DISPLAY Customer.Cust-Num NAME Order-Num Order-Date. END.

Please explain me

Regards Suga

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