Identifier is used to identify variables, classes, objects, functions, etc. To simply put it is a name by which anything can be identified in Python.
Rules for identifiers in Python:
- First letter must not be a number
- can start with underscore or alphabet
- identifier can be a mix of alphabets, numbers, underscore
- Special characters cannot be used
- maximum length of identifier is 79 characters
Tips to use identifiers:
- use a proper name which represents the functionality
- As Python is case sensitive, be careful while using the identifiers
- While starting an identifier with _ (underscore) is allowed, readability wise this doesn't give a good feel
- When the identifier is long, try to separate with _ (underscore) which improves readability
Example usage of identifiers:
num
Num
_num
num1
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