Issue when using ceil function

Hello,

I am new to Matlab. I noticed a difference when using the ceil function:

a = ceil(511*5e-6*8e5);

b = ceil(511*5*0.8);

May I know the reason why I got different results for a and b?

Answer 1

[Tushar Behera]

Hi Silvester,

The results for a and b are different because the expressions for each of them are different. The issue is not with MATLAB but it is due to how the data for floating point numbers are stored in a computer.

For a better understanding please refer to this MATLAB Answer,

Error in ceil() function? - MATLAB Answers - MATLAB Central (mathworks.com)

I hope this helps you.

Regards,

Tushar

Answer 2

[Image Analyst]

See the FAQ:

https://matlab.fandom.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_(or_similar)_not_equal_to_zero?