Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!srhqla!demott!kdq
From: kdq@demott.COM (Kevin D. Quitt)
Newsgroups: comp.sys.ibm.pc.programmer
Subject: Re: How to calculate LOG10 in BASIC?
Message-ID: <301@demott.COM>
Date: 14 Jun 90 20:03:16 GMT
References: <7196.267754e0@eva.slu.se>
Reply-To: kdq@demott.COM (Kevin D. Quitt)
Organization: DeMott Electronics Co., Van Nuys CA
Lines: 26

In article <7196.267754e0@eva.slu.se> jn@eva.slu.se (Jan Nilsson) writes:
>Hello programmers!
>
>Sorry to disturb You with a (I don't know if I dare say it..) BASIC
>question. I want to calculate the common logarithm (LOG10) and BASIC 
>only support LOG, the natural logarithm. Could it be calculated in 
>another way?
>

    Nothin' to do with BASIC.  All you need is a magic number:

0.4342944818 (log10 of e)

now, since the log10 of a = log10 of e * ln of a

et voila!


-- 
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Kevin D. Quitt         Manager, Software Development    34 12 N  118 27 W
DeMott Electronics Co. 14707 Keswick St.   Van Nuys, CA 91405-1266
VOICE (818) 988-4975   FAX (818) 997-1190  
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