Why do computers suck at math?

What is a floating point number? And why does it produce rounding errors for programmers?

#shorts #compsci #math

Resources:

[Fireship]

⚡ If you wanna learn to code faster make sure to hit subscribe!!!

[coompiler]

if (num1 == 0.1 && num2 ==0.2) {
return 0.3
}
There we go solved it

[tanmay______]

Finally, I can now show this to mom and tell her I’m better than computers

[AIM-X_Sidewinder]

"your computer sucks at math"
calculator: my objectives are beyond your understandings

[AmanSingh-wkqu]

To be exact, it's a limitation of the IEE754 floating point standard. There are implementation of arbitrary precision floating point libraries (aka bignums) but they're slower and less optimised for modern CPUs

[morethanjustasloth]

“JavaScript is a toy language, so I tried Python instead.”

Hahahahaha

[roua.]

today I (finally) learned the meaning of "floating" in floating point. great vid

[joaovgarcia]

damn i wish there was a longer version explaining more on this topic

[marc-io]

It's funny that he assumed JS was broken and thought python wouldn't

[Pixelcraftian]

_”Good job on solving all of the tough questions, this one is the money shot, what’s 0.1 + 0.2?”_
The computer: 😓

[FingerprintGamer]

I remember debugging my code for a week until i realised it was the freakin rounding system

[flamesnail]

I know in python it’s fixed with:
from decimal import Decimal

X=Decimal(‘0.1’)
Y=Decimal(‘0.2’)

print(X+Y)

[NeXus]

For anyone wondering, the solution, if you want exact decimal arithmetic, is to use a decimal library, such as Python's decimal module.

[wanderingbufoon]

"Computers use base 2 while humans use base 10"
Me: "the future is not now, young kid"

[animeblackguy_]

“javascript is just a toy language tho” *church bells toll*

[hudmo]

Just came through Modeling Methods at university, where we discuss all the ways to circumvent this and other computer problems when performing math ops. Pretty interesting

[bgaabt]

"And that's why your computer sucks at math" - the stupid machine can't even calculate an 18-digit number correctly

[marcframe]

create two accounts in your bank.
#1 with all your money
#2 with 0.1 cents
move 0.2 cents from #1 to #2 then move back to #1
rinse and repeat

[Sal]

That's why in Python you use the Decimal type, which stores rounding errors when doing calculations, eliminating them. Pretty important when you do finance calculations or any other calculation that requires +15 digit precision.

[Cathay]

teacher "you only scored 40% in the test"
me "lemme show you something"