Re: Math calculations

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#16502

From: Tor Iver Wilhelmsen
Date: Wed, 17 Feb 1999 00:00

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"Kerry Helmer" <khelmer@parlorcity.com> writes:

>This returns 0.9899999999999949 instead of .99  Can someone help explain to
>me what I'm doing wrong?

You're not, but the IEEE floating point standard has problems
expressing some numbers.

> Does anybody have some rules to follow that would help me when performing
> math operations?

Use integers for currency. (that is, represent e.g. $1.69 with the
number 169).

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From: Tor Iver Wilhelmsen <tor.wilhelmsen@sds.no>
Subject: Re: Math calculations
Date: 1999/02/17
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