Building Blocks of Python: Identifiers

 Building Blocks of Python:

2. Identifiers

• An identifier is a name given given to entities like class, functions, variables, etc.
• It helps to differentiate one entity from another

Rules for writing identifiers:

1. Identifiers can be a combination of

                        a. letters in lowercase (a to z), or

                        b. letters in uppercase (A to z), or

                        c. digits (0 to 9), or

                        d. an underscore (_)

  

        2. An identifier cannot start with a digit

        3. Cannot use keywords as identifiers

          4. Cannot use special characters [except from underscore (_)]