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ksaravan · Beginner Joined: 28 Jan 2004 Posts: 1 Topics: 1

Hi,

I heard that COMP fields are preferable to COMP-3 fields for complex calculations. Is there any reason behind this ? Can anyone elaborate on this.

thanks,
K.S

kolusu · Posted: Wed Jan 28, 2004 8:52 am Post subject:

Saravan,

The performance of the variables(comp or comp-3) depends on the type of arithmetic you are doing, and the final disposition of the results.

If your calculation is pure integer arithmetic, COMP is the best choice.
For calculation involving decimal portions (money related ), COMP-3 is the best choice.
For scientific calculation , sines, cosines, random number generation, COMP-2 is the best choice.

You can do a test for yourself. Code 2 different pgms with the same compute statement but fields defined as comp and comp-3. Add the following statement before the ID division