MATLAB: 0.9-0.89 is 0.01000000​0000000000​2081668171​17217

faqif statement

Hi, why
0.9-0.89 is 0.010000000000000000208166817117217?
I want to use it in:
if a-b<c sprintf('error') end……
when I use vpa, than I get error in if..
thank you

Best Answer

One of the most frequently asked questions, so see the FAQ: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F
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