- The only allowed characters in Python are alphabet symbols(either lower case or upper case) digits(0 to 9) underscore symbol(_)
By mistake if we are using any other symbol like $ then we will get syntax error.
cash = 10 Correct
ca$h = 20 Incorrect
Identifier should not starts with digit
123total Correct
total123 IncorrectIdentifiers are case sensitive. Of course Python language is case sensitive language.
total=10
TOTAL=999
print(total) #10
print(TOTAL) #999
Identifier:
Alphabet Symbols (Either Upper case OR Lower case)
If Identifier is start with Underscore (_) then it indicates it is private.
Identifier should not start with Digits.
Identifiers are case sensitive.
We cannot use reserved words as identifiers
Eg: def=10There is no length limit for Python identifiers. But not recommended to use too lengthy
identifiers.Identifier:Dollor ($) Symbol is not allowed in Python.
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