- It helps us in differentiating one entity from another.
- The name given to entities like class, function, variables etc is known as identifiers.
Below Are Some Rules For Writing Identifiers:
- An identifier can be a combination of letters in lowercase(a to z) or uppercase(A to Z) or digits(0 to 9) or an underscore(_).
- An identifier cannot start with a digit(0 to 9).
- Keywords cannot be used as identifiers.
- We cannot use special symbols like: @, #, %, /, & etc in identifiers.
Example
dummyVar = 10
Output
10
Example
As global is a keyword, we cannot use it as identifiers.
global = 1
Output
SyntaxError: invalid syntax
Example
Variable names cannot start with digits.
203_dummyVar = 23
Output
SyntaxError: invalid token