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Class notes

Class notes Python

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Dive into the world of Python programming with these comprehensive notes! Whether you’re a beginner or looking to enhance your skills, these notes cover everything from basic syntax to advanced concepts like data structures and object-oriented programming. Packed with clear explanations, practica...

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Document information

  • November 2, 2024
  • 2
  • 2024/2025
  • Class notes
  • Jjjmg
  • All classes

Subjects

  • instresting
  • easier to understand
  • understandable
  • get clear of the concept

Written for

  • Secondary school
  • Python
  • 4
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Python Tokens
The Smallest individual unit in a python program is known as Tokens".
Python has mainly 5 types of tokens which are given below -:
1. Keywords
2. Identifiers
3. Operators
4. Literals
5. Punctuators

Keywords-Keywords are the reserved word having special meaning and purpose in Python.
Eg:- true, false, if, and etc.

Identifiers- An identifier is a name given to a variable. It helps to differentiate one entity from
others.

Python Variable Name Rules
• A variable name must start with an alphabet (capital or small) or an underscore
character
• A variable name cannot contain spaces.
• A variable name can contain any number of letters,digits and underscore.
• A python keyword cannot be used as a variable name.
• Special characters aren’t allowed in variable names.
Which of the following variable names are valid/invalid

(a)123 Hello-Invalid

(b) Sum-valid
(c) abc@123 - Invalid
(d) 2myvar - invalid
(e) my-var - invalid

(f) MYVAR- Valid

(g)_name - valid

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