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Abhay Singh Kathayat
Abhay Singh Kathayat

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Python 101: Back to Basics Part 1

#webdev #programming #python #beginners

Introduction

Python is one of the most popular programming languages in the world. Its simplicity, readability, and vast community support make it an excellent choice for beginners and professionals alike. Whether you're a complete novice or someone refreshing their skills, this guide will take you through the fundamental concepts of Python in an easy-to-understand manner.

Why Learn Python?

Before diving into coding, let's understand why Python is worth learning:

  • Simple Syntax: Python's syntax is clear and readable, making it easier for beginners to grasp.
  • Versatile: Python is used in web development, data science, machine learning, automation, and more.
  • Large Community: A massive global community ensures that help and resources are always available.
  • Extensive Libraries: Python has a rich ecosystem of libraries like NumPy, Pandas, TensorFlow, and Flask that make development faster and more efficient.

Setting Up Python

Step 1: Installing Python

To start coding in Python, install the latest version from the official website:
Python Official Website

After installation, verify the installation by running:

python --version
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(Use python3 --version on macOS and Linux.)

Step 2: Setting Up an Editor

You can write Python code in:

  • IDLE (Python’s built-in editor)
  • VS Code (Recommended)
  • PyCharm (Great for advanced users)
  • Jupyter Notebook (Preferred for data science)

Python Basics

1. Printing Output

The print() function is used to display text and data.

print("Hello, World!")
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2. Variables and Data Types

Python supports multiple data types, such as strings, integers, and floats.

name = "Alice"
age = 25
height = 5.6
is_student = True
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You can check the type of a variable using:

print(type(name))  # <class 'str'>
print(type(age))   # <class 'int'>
print(type(height)) # <class 'float'>
print(type(is_student)) # <class 'bool'>
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3. Taking User Input

To accept input from users, use the input() function.

name = input("Enter your name: ")
print("Hello, " + name + "!")
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4. Basic Operators

Python supports arithmetic and logical operators:

x = 10
y = 5
print(x + y)  # Addition
print(x - y)  # Subtraction
print(x * y)  # Multiplication
print(x / y)  # Division
print(x % y)  # Modulus
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5. Conditional Statements

Python allows decision-making using if, elif, and else.

num = int(input("Enter a number: "))
if num > 0:
    print("Positive number")
elif num < 0:
    print("Negative number")
else:
    print("Zero")
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6. Loops in Python

Loops are used for repetition.

For Loop 

for i in range(1, 6):
    print(i)
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While Loop 

count = 0
while count < 5:
    print(count)
    count += 1
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7. Functions in Python

Functions help organize and reuse code.

def greet(name):
    print("Hello, " + name + "!")

greet("Alice")
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Conclusion

This article covered Python's fundamental concepts, from variables to loops and functions. In the next part, we'll explore more advanced topics like data structures, file handling, and object-oriented programming. Stay tuned!

Happy Coding!

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