Re: Cube root

["Richard Thomas" <RichardThomas@xxxxxxx>]

Hi Walter,

 

Yikes! I've never had to do this in RPG before...

 

I can only suggest that you use RPG IV and a couple of procedures exports in service program QC2UTIL1, namely 'pow' and 'log10'.

 

Then you could say that the cube root of a number, X, is 10 to the power of (LogX/3).

 

E.G.    CubeRoot of 512 is 10 to the power of 2.7093/3 which equals 10 to the power of 0.9031 = (approximately) 8.

 

Naturally, the more decimal positions you allow for the logarithm value, the more accurate the results.

 

I'm sure there are people on the list who can provide you with a better or more elegent solution than this, but it's the best I can come up with for now.

 

Best wishes,

 

Richard

----- Original Message -----

From: Walter Hesius

To: RPG400-L@midrange.com

Sent: Thursday, February 15, 2001 12:05 AM

Subject: Cube root

Hi all,

 

I would like to know a way to calculate the cube root of a number. We are on V4R4.

 

Thanx.