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From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.lang.c
Subject: Re: "A diagram of C23 basic types"
Date: Mon, 7 Apr 2025 22:14:20 +0200
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On 07.04.2025 20:18, bart wrote:
> On 07/04/2025 19:12, Michael S wrote:
>> On Mon, 7 Apr 2025 19:02:34 +0100
>> bart <bc@freeuk.com> wrote:
>>
>>> On 04/04/2025 04:01, Lawrence D'Oliveiro wrote:
>>>> On Wed, 2 Apr 2025 16:33:46 +0100, bart wrote:
>>>>   
>>>>> Here, tell me at a glance the magnitude of
>>>>> this number:
>>>>>
>>>>>        10000000000
>>>>
>>>>       #define THOUSAND 1000
>>>>       #define MILLION (THOUSAND * THOUSAND)
>>>>       #define BILLION (THOUSAND * MILLION)
>>>>
>>>>       uint64 num = 10 * BILLION;
>>>>
>>>> Much easier to figure out, don’t you think?
>>>
>>> Try 20 * BILLION; it will overflow if not careful.
> 
> (Actually both 10/20 billion will overflow u32; I was thinking of 20
> billion billion overflowing u64.)
> 
>>> I'd normally write '20 billion' outside of C, since I use such
>>> numbers, with lots of zeros, constantly when writing test code.
>>>
>>> But when it isn't all zeros, or the base isn't 10, then numeric
>>> separators are better.
>>>
>>
>> Is not it "20 milliards" in British English?
> 
> We (UK) now use 'billion' for 1E9; in the past it meant 1E12.
> 
> 'Milliardo' is Italian for 'billion'; perhaps in a few other languages too.

"In a few other languages"? - That was not my impression;
and a quick look into Wikipedia seems to support that.

The global map[*] is interesting!

(Read the articles for the details, the historic base, and
especially what's standard in countries, and why the common
standard is in some cases like GB not used primarily today.)

Janis

https://upload.wikimedia.org/wikipedia/commons/7/7c/World_map_of_long_and_short_scales.svg

Green - long scale
Blue - short scale
Turquoise - both, long and short
Yellow - other scales