Why do my numbers not add up correctly in MATLAB?

When I add numbers together, and then compare the result to a number that I think is the correct result using "==" or the ISEQUAL function, the comparison returns as "false" or 0.

For example:

a = 0.1 + 0.1 +0.1;

b = 0.3;

a == b

 ans =

      0

Answer 1

[MathWorks Support Team]

This behavior is related to floating-point arithmetic and the way numbers are represented in a computer. For more information on this subject, see the related Solution below.