0.1+0.2-0.3=?

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Jon on 7 Jul 2011

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Hello,

Apologies if I'm doing something stupid, but could someone please explain why 0.1+0.2-0.3 apparently equals 5.5511e-017?

If this is confirmed, I find it quite worrying, so are there other such "features" that may be quietly affecting my results without me being aware of them?

Many thanks, Jon.

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Sean de Wolski on 7 Jul 2011

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stupid, no; common, yes.

FAQ6.1

In fact this is the most frequently asked question on here and CSSM.

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Jon on 7 Jul 2011

Many thanks, I missed previous mentions of this. Glad it's not just me!

Sean de Wolski on 7 Jul 2011

You're welcome; welcome to MATLAB Answers!

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