Question about frac()

[PeterD]

I need help understanding the output of the frac() function. Per the example in the function reference, frac( 12.4 ) should return 0.4, however it actually returns 0.3999996. Is there something that I need to understand about floating point math here?

[bysoaa]

Check this: https://www.h-schmidt.net/FloatConverter/IEEE754.html

[fxshrat]

@Tomasz has posted here already

Integer question : Int( NUMBER )

Int() TRUNCATES fractional part. Normal Plot will round to certain number of digits. Now 0.59 has infinite representation in binary that is slightly less than 0.59. Check this: IEEE-754 Floating Point Converter (IEEE754 floating point representation is 0x3f170a3d which is really 0.589999973773956298828125) You need to read this to understand:

[PeterD]

Got it, thanks for helping me understand. I need to spend some time learning about floating point math. It was too easy to just make a wrong assumption.