One of the common uses of unsigned numbers is as bitmasks. I would be greatly annoyed if they did not print as hexadecimals, as that is exactly what I need them for. And that seems to be fairly common in other languages too.

[image] joa-quim: Yes, I use Unsigneds for images, and I have to use them because I need to interface in/out with the GMT and GDAL C libs, that expect unsigned types. That sounds like a perfect use case for FixedPointNumbers. Whether the C lib uses unsigned integers doesn’t matter if the back…

[image] simeonschaub: each hexadecimal digit Digits? But are you using printed text? As I said above, sorry but I’ve no idea on what you guys are talking about.

Say you wanted to extract the 4 most significant bits of a UInt8. In hexadecimal you would write this as x & 0xf0. In decimal that would be x & 240. Can you really tell with the latter what’s going on on the bit level? Printing this number as 0xf0, makes the bit-pattern much more obvious, since if y…

As @simeonschaub says, that’s not a reason to avoid the FixedPointNumber types, because their bit-level representation is Unsigned and that’s all the C code sees. You get two other advantages: conversion between floating-point and integer types “just works”: normally you’re supposed to convert a U…

OK, I removed tat pirate show because I don’t want to push it to other people but will have to find a replacement because I simply cannot understand why Unsigneds are printed in a illegible way (c’mon, who can read hexadecimal). Regarding the invalidations, will try to dig but low expectation. Anyw…

[image] joa-quim: OK, I removed tat pirate show because I don’t want to push it to other people but will have to find a replacement because I simply cannot understand why Unsigneds are printed in a illegible way (c’mon, who can read hexadecimal). Sorry, I meant to move this post to the top of…

[image] joa-quim: I simply cannot understand why Unsigneds are printed in a illegible way (c’mon, who can read hexadecimal). I kinda take offense on that. I had to print float numbers in hexadecimal my thesis to guarantee 100% reproducibility because I was having chaos effect problems. It is …

[image] Henrique_Becker: I had to print float numbers in hexadecimal my thesis to guarantee 100% Presumably you didn’t do your thesis in Julia? Julia uses Ryu for printing floating point. Ryu generates the shortest decimal representation of a floating point number that maintains round-trip…

No, I will not, both because I am using Julia but also because I am not working in the same subject anymore, XD

So, according to your example/experience, all floating points should be printed in hexadecial by default :slightly_smiling_face: Off course there several reasons to print in hexa, but what I don’t understand is why are we all obliged to see unsigned numbers being printed in hexadecimal by default

Printing of unsigned numbers

Internals & Design

stevengj April 18, 2022, 11:40am 9

Sorry, I meant to move this post to the top of this thread since it came first chronologically, and was in response to:

Topic		Replies	Views
Workspace doesn't display UInt values New to Julia juno	11	750	July 6, 2021
What determines if integers are formatted as hex or not in the REPL? New to Julia	3	214	August 30, 2023
I can not understand the meaning of this sentence on the doc New to Julia faq	4	1849	February 20, 2019
Julia create and populate empty dataframe with unsigned number value New to Julia	1	995	June 4, 2019
How to display UInt in decimal instead of hexadecimal General Usage question , repl	6	3022	October 12, 2022

Printing of unsigned numbers

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