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There is no READ() function unless you've rolled your own.
On a DOU, the condition is evaluated at the ENDDO. On a DOW, the condition is evaluated ON the DOW. It has nothing to do with READ. The READ opcode doesn't return anything. I positions the file pointer to the next record, and loads the internal memory with the data from the record. If it's the last record in the file, %EOF will return *on ('1').
Mark Walter
Business to Business Data Integration Specialist
Certified IBM System i Specialist
Paragon Consulting Services, Inc
mwalter@xxxxxxxxxxxxxxx
717-764-7909 ext. 126
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of mprice@xxxxxxxxx
Sent: Wednesday, March 10, 2010 3:09 PM
To: RPG programming on the IBM i / System i
Subject: Re: First Read () always returns a blank?
The READ() on the DOU is NOT called until the program gets to the ENDDO.
Thats how DOU works !
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