Question

reasons for valid identifier

Answer 1

Explanation:

Identifiers are symbols used to uniquely identify a program element in the code. They are also used to refer to types, constants, macros and parameters. An identifier name should indicate the meaning and usage of the element being referred.

Answer 2

Answer:

A valid identifier can have letters (both uppercase and lowercase letters), digits and underscores. The first letter of an identifier should be either a letter or an underscore. ... There is no rule on how long an identifier can be.