Python for Absolute Beginners: Full Guide with Code Examples

Python Basics for Absolute Beginners: Complete Guide

Welcome to TECH WORLD! If you're new to Python, you're in the right place. This tutorial covers all the basics you need to start writing your own programs—from printing messages to writing simple logic. Let's dive in!

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1. Printing Output

Use the print() function to display messages to the user.

print("Welcome to TECH WORLD!")

Explanation:

• print() is a built-in function that displays text.
• Text is wrapped in double or single quotes.

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2. Variables and Data Types

Variables store data that you can use later. Python handles different data types like text, numbers, and more.

name = "Alice"        # String
age = 30              # Integer
height = 5.7          # Float
is_coder = True       # Boolean

Explanation:

• name is a string (text).
• age is an integer (whole number).
• height is a float (decimal number).
• is_coder is a boolean (True/False).

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3. User Input

Get data from the user using the input() function.

username = input("Enter your name: ")
print("Hello, " + username + "!")

Note: input() always returns a string.

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4. Type Conversion

Convert strings to numbers using int() or float().

age = input("Enter your age: ")
age = int(age)
print("Next year, you will be", age + 1)

Why? You can't do math with strings, so we convert them to integers.

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5. Conditional Statements (if/else)

Use conditions to make decisions in your program.

age = int(input("Enter your age: "))

if age >= 18:
    print("You're an adult.")
else:
    print("You're underage.")

Explanation:

• if checks a condition.
• else runs if the condition is false.
• : is required after each condition line.

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6. Loops (for and while)

For Loop: Repeats a block of code a set number of times.

for i in range(5):
    print("Loop number:", i)

While Loop: Repeats while a condition is true.

count = 0
while count < 5:
    print("Count is", count)
    count += 1

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7. Functions

Functions group code together to reuse later.

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

greet("Alice")
greet("Bob")

Explanation: Use def to define a function. Call it by name.

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8. Final Mini Project: Greeting Bot

Let’s combine what we’ve learned into a small program!

def greet_user():
    name = input("What is your name? ")
    age = int(input("How old are you? "))
    
    print("Hello,", name + "!")
    if age < 18:
        print("You’re still young and learning!")
    else:
        print("Keep building cool stuff!")

greet_user()

This project uses input, type conversion, conditionals, and functions together.

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What’s Next?

• Learn about lists and dictionaries
• Build basic games with conditions and loops
• Understand error handling and debugging

Stay tuned on TECH WORLD for the next tutorial!