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Editorial Team
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Asked: 2026-05-11T16:11:21+00:00

This question is language agnostic but is inspired by these c/c++ questions. How to

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This question is language agnostic but is inspired by these c/c++ questions.

How to convert a single char into an int

Char to int conversion in C

Is it safe to assume that the characters for digits (0123456789) appear contigiously in all text encodings?

i.e. is it safe to assume that 

'9'-'8' = 1
'9'-'7' = 2
...
'9'-'0' = 9

in all encodings?

I’m looking forward to a definitive answer to this one 🙂

Thanks,

Update: OK, let me limit all encodings to mean anything as old as ASCII and/or EBCDIC and afterwards. Sandscrit I’m not so worried about . . .

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1 Answer

  1. Editorial Team

    I don’t know about all encodings, but at least in ASCII and <shudder> EBCDIC, the digits 0-9 all come consecutively and in increasing numeric order. Which means that all ASCII- and EBCDIC-based encodings should also have their digits in order. So for pretty much anything you’ll encounter, barring Morse code or worse, I’m going to say yes.

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