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From: bart <bc@freeuk.com>
Newsgroups: comp.lang.c
Subject: Re: "A diagram of C23 basic types"
Date: Mon, 7 Apr 2025 19:18:48 +0100
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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.