Closed Bug 408202 Opened 17 years ago Closed 17 years ago

Javascript modulo operator returns incorrect result when using floating point numbers

Categories

(Firefox :: General, defect)

PowerPC
macOS
defect
Not set
normal

Tracking

()

RESOLVED DUPLICATE of bug 5856

People

(Reporter: rob, Unassigned)

Details

User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11 Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11 This statement, (23.98*3600) % 23.98, yields the answer 23.979999999998466, which is obviously illogical. (24*3600) % 24 yields 0, which is correct. (59.97*3600) % 59.97 yields 4.092726157978177e-12, which is way off the mark. This happens in html pages, but can also be seen in the error console. Reproducible: Always Steps to Reproduce: 1. Open error console 2. Type in (23.98*3600) % 23.98 in the evaluate field 3. Press Evaluate Actual Results: Messages window displays 23.979999999998466 Expected Results: Message window should display 0
This is just the general issue with the presumed accuracy of floating point values.
Status: UNCONFIRMED → RESOLVED
Closed: 17 years ago
Resolution: --- → DUPLICATE
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