Python Identifiers


  • Identifiers are programmer defined tokens.
  • They are used fro naming classes, methods, variables, module,packages etc.. in a program.

Rules for a Legal Identifier :

  1. They can be a set of alphabet, digits and underscore ( _ ) character.

  2. They must not begin with digit .

  3. Since Python is case sensitive language, Uppercase and Lowercase letters are distinct.

  4. They can be of any length.

  5. They must not be a keyword.


Example of legal identifier :

     arena , s_count
     marks40
     class_one

Example of illegal identifier :

     1sst
     2nd number
     oh!god


Next chapter is operators in python





 



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