[Maxima-bugs] [ maxima-Bugs-1178697 ] Floating point 1.15 shows as 1.1499999999999999

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Bugs item #1178697, was opened at 2005-04-07 12:55
Message generated for change (Settings changed) made by rtoy
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Category: Lisp Core
Group: Fix for 5.9.2
>Status: Pending
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Floating point 1.15 shows as 1.1499999999999999

Initial Comment:
Example console input and output:

(%i1) x = 1.15;
(%o1) x=1.1499999999999999

This may be a trivial rounding issue with floating
points in Lisp, a problem with the system CPU (Pentium
3) or something in software.

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Comment By: Raymond Toy (rtoy)
Date: 2005-04-07 13:27

Message:
Logged In: YES 
user_id=28849

What platform?  What lisp?

CMUCL on sparc prints 1.15.  This is most likely an issue
with your Lisp implementation.

This is a general issue.  1.15 cannot be represented exactly
in binary, so there can be issues when printing it out.

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