#27685 [NEW]: floating point?

From: ymlee at ibcenter dot co dot kr Operating system: linux PHP version: 4.3.4 PHP Bug Type: *General Issues Bug description: floating point? Description: ------------ $a=33.6; $b=84.7; $c=118.3; $d=$a+$b-$c; echo $d; the answer should 0. but result is 1.4210854715202E-14. it is strange!!! Reproduce code: --------------- $a=33.6; $b=84.7; $c=118.3; $d=$a+$b-$c; echo $d; Expected result: ---------------- 0 Actual result: -------------- 1.4210854715202E-14 -- Edit bug report at http://bugs.php.net/?id=27685&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27685&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27685&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=27685&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=27685&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=27685&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=27685&r=needscript Try newer version: http://bugs.php.net/fix.php?id=27685&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=27685&r=support Expected behavior: http://bugs.php.net/fix.php?id=27685&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=27685&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=27685&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=27685&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27685&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=27685&r=dst IIS Stability: http://bugs.php.net/fix.php?id=27685&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=27685&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=27685&r=float