How do I find the x root of y?

Question

I want to make it so I can find any root of any number, and I have a good method in general but it will say stuff like the cubed root of 64 (which is 4) is 3.99999996 or something like that. Is there any way to fix it? I'm also pretty new to any type of programming so you might have to dumb down your explanation.
https://code.sololearn.com/cXx5aNs3mOW0/?ref=app

Answer 1

Reece, the very short version of the story is that computers are inaccurate with the decimals, there will always be strange digressions from what we expect for technical reasons.

For example, just try to write this:

Print(0.3)

;-)

I think the basic way to deal with it is not to use floats when the accuracy of the decimals really matters...

One workaround is to calculate a number digit by digit, as you would do it by hand on paper, and add the digits to some sort of list one by one, evading floats altogether. The result will not necessarily be a number that the computer can easily work with though...

I have played around with the idea a few times.

The first code calculates a square root digit by digit; the second code... well what's that about you'll find explained in 'Coding Challenges'... but you need the proper decimals for it.

If you look at the codes... well, it's a bit messy...

https://code.sololearn.com/cnCk4wRLTkS6/?ref=app
https://code.sololearn.com/c70NlpQokwmr/?ref=app

Answer 2

Thanks to both of you!

Answer 3

print(round(3.999999996))
#4

Answer 4

+1