Why are many languages case sensitive?

Question

Why are many languages case sensitive?

Is it simply a matter of inheritance? C++ is case-sensitive because C is, Java is case-sensitive because C++ is, etc.? Or is t

Answer 1

The upper-case of a letter isn't a universal concept. Java uses Unicode, so if you wanted case-insensitive Java, the meaning of your program could change depending on what locale it was compiled in.

Most languages don't let you put dots or commas (or apostrophes or spaces) in the middle of integer literals, probably because that's also locale-dependent.