Introduction to Python Programming

What is Python?

• Python is a programming language known for its simplicity and ease of use.
• It is free and open-source, allowing users to modify and distribute the code.
• Classified as a high-level language, it provides a user-friendly syntax.
• Developed by Guido van Rossum, enhancing accessibility for beginners.
• Portable across various platforms, ensuring compatibility and versatility.

First Python Program

• A basic Python program example: print("Hello World"), which outputs a greeting.

Python Character Set

• Includes letters (A-Z, a-z), digits (0-9), and special symbols such as +, -, *, /, etc.
• Supports whitespaces, including spaces, tabs, and newlines.
• Capable of processing all ASCII and Unicode characters within data or literals.

Variables

• Variables act as symbolic names for memory locations, facilitating data storage.
• Example of variable declarations:
  • name = "Shradha"
  • age = 23
  • price = 25.99

Memory

• Memory allocation is demonstrated through variable examples (name, age, price).
• Variables maintain their values in specific memory locations.

Rules for Identifiers

• Identifiers must follow specific naming conventions that differentiate them from keywords.

Data Types

• Common data types in Python include:
  • Integers
  • Strings
  • Floats
  • Booleans
  • None (indicating the absence of a value)

Keywords

• Keywords are reserved words with special meanings in Python; for instance, False must be in uppercase.

Comments in Python

• Single-line comments can be created with the # symbol.
• Multi-line comments are enclosed within triple quotes: """ comment """.

Types of Operators

• Operators perform operations on operands, classified as follows:
  • Arithmetic Operators: +, -, *, /, %, **
  • Relational/Comparison Operators: ==, !=, >, <, >=