Identifiers are the names given to variables, constants, functions and class while writing a program.
reea --> area --> understand by programmer i.e identifier
Rules for an identifier
An Identifier can only have alphanumeric characters(a-z , A-Z , 0-9) and underscore(_).
The first character of an identifier can only contain alphabet(a-z , A-Z) or underscore (_) not digits.
Identifiers are also case sensitive in python. For example name and Name are two different identifiers.
Keywords are not allowed to be used as Identifiers.
No special characters, such as semicolon, period, whitespaces, slash or comma, $,@ are permitted to be used in or as Identifier. Ex ab@c , ab$c are give error.
Note:-
Python is a case-sensitive language and it has some rules and regulations to name an identifier.
