Question

what is the datatype that accept both character and a number in c

Answer 1

C type 'char' is an integer type interpreted as a character by some character mapping.

So you can store small integers in it. Then use it as an integer or a char.

https://onlinegdb.com/Hk-xMnrJQ

But it is not very clean, so you'd prefer to define a union that will store either a char or an int.

Answer 2

char is the answer