Are digits represented in sequence in all text encodings?

Question

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

Answer 1

All text encodings I know of typically order each representation of digits sequentially. However, your question becomes a lot broader when you include all of the other representations of digits in other encodings, such as Japanese: １２３４５６７８９０. Notice how the characters for the numbers are different? Well, they are actually different code points. So, I really think the answer to your question is a hard maybe, since there are so many encodings out there and they have multiple representations of digits in them.

A better question is to ask yourself, why do I need to count on digits to be in sequential code points in the first place?