Introduction to Python - Rishan Solutions

What is Python?

Python is a high-level, interpreted programming language known for its simplicity and readability. It was created by Guido van Rossum and first released in 1991. Python supports multiple programming paradigms, including procedural, object-oriented, and functional programming.

Why Learn Python?

Python is one of the most popular programming languages in the world due to its:

Easy-to-read syntax – Python’s syntax is straightforward and similar to English, making it beginner-friendly.
Versatility – It is used in web development, data science, machine learning, automation, and more.
Large Community Support – Python has a vast community, extensive libraries, and frameworks.
Cross-platform Compatibility – Python runs on Windows, macOS, and Linux.

Installing Python

To get started with Python, you need to install it on your computer.

Download Python from the official website: https://www.python.org/downloads/
Run the installer and check the option “Add Python to PATH” before installing.
Verify installation by opening a terminal or command prompt and typing: python --version

Writing Your First Python Program

You can write Python code in various ways, such as using the Python interactive shell, IDLE, or text editors like VS Code and PyCharm.

Here’s a simple Python program that prints “Hello, World!”:

print("Hello, World!")

Running a Python Script

Save the above code in a file named hello.py and run it in the terminal using:

python hello.py

Basic Python Syntax

Variables and Data Types

Python supports different data types, including:

name = "Alice"   # String
age = 25         # Integer
height = 5.6     # Float
is_student = True # Boolean

Control Flow

Conditional Statements

x = 10
if x > 5:
    print("x is greater than 5")
else:
    print("x is 5 or less")

Loops

For Loop

for i in range(5):
    print(i)

While Loop

count = 0
while count < 5:
    print(count)
    count += 1

Functions

Functions help in reusing code.

def greet(name):
    return "Hello, " + name

print(greet("Alice"))

Python Libraries

Python has many powerful libraries, including:

NumPy – for numerical computations
Pandas – for data analysis
Matplotlib – for data visualization
Django – for web development
TensorFlow – for machine learning

Python is a powerful, easy-to-learn programming language that is widely used across various domains. Whether you’re a beginner or an experienced developer, learning Python can open up many opportunities in tech fields such as web development, automation, AI, and more.

Next Steps

Practice writing Python programs.
Learn about advanced topics like Object-Oriented Programming (OOP) and File Handling.
Explore Python frameworks and libraries based on your interest.

Happy coding!