First exposure to floating-point arithmetic (peertube.mesnumeriques.fr)

submitted 2 weeks ago by yogthos@lemmy.ml to c/programmerhumor@lemmy.ml

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[-] data1701d@startrek.website 2 points 2 weeks ago

C:\home\dexcube\Development\piper\build> python3
Python 3.13.2 (main, Mar 13 2025, 14:29:07) [GCC 14.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from decimal import Decimal
>>> Decimal('0.1') + Decimal('0.2')
Decimal('0.3')

[-] Ephera@lemmy.ml 6 points 2 weeks ago

> C:\
> on linux

Absolutely illegal.

[-] data1701d@startrek.website 2 points 2 weeks ago

I use the Chicago95 XFCE theme, which modifies the bash prompt.

[-] yogthos@lemmy.ml 1 points 2 weeks ago

I mean sure, I can do this with Clojure too

Babashka v1.12.197 REPL.
Use :repl/quit or :repl/exit to quit the REPL.
Clojure rocks, Bash reaches.
user=> (float (+ (/ 1 10) (/ 2 10)))
user=> 0.3

[-] vext01@lemmy.sdf.org 1 points 2 weeks ago

I looked into this at some point in the past.

From memory, despite 0.3 being unrepresenatable, the routine that formats the output rounds it (stringily) to 0.3.

Someone can correct me, because it's only a vague memory at this point.

this post was submitted on 05 Apr 2025

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