Can I round 0.1 + 0.2 to 0.30 not the default 0.30000000000000004 in Julia.

It sounds like what you actually want is a number type that can accurately represent fractions. How about a Rational number? julia> 1//10+2//10 3//10 julia> float(1//10+2//10) 0.3

If you know you have exactly fractions I would go with above suggestion. If you don’t know that and just want to represent numbers with some amount of significant digits you can do julia> round(0.1+0.2, sigdigits=1) 0.3

Hey thanks for the reply. But I am not looking for rational numbers as a solution. Is it possible to round the float result to a lesser precision with dynamic decimal digits. Essentially by not using round() digit or sigdigits option,

Hey thanks for the reply. I already tried this method. But in various test cases sigdigits can vary. Can I dynamically assign sigdigits some how?

Can you explain what behaviour you want? Maybe you need to use a decimal floating point type such as https://github.com/JuliaMath/DecFP.jl .

You have to define the behavior you want. “Dynamic digits”—based on what?

In case you are not aware of what is causing this phenomenon, look here: https://0.30000000000000004.com/ and here: PSA: floating-point arithmetic

[image] n90: Hey thanks for the reply. I already tried this method. But in various test cases sigdigits can vary. Can I dynamically assign sigdigits some how? The problem is that 0.1 with floating points arithmetic is not equal to the real number 0.1, it is only equal if you round it to somew…

Round float addition

General Usage

rafael.guerra December 17, 2021, 9:46am 8

Just in case, for MATLAB-like formatting see a solution in this post.

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Round float addition

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