What is Python?

 

A clear, beginner-friendly, and detailed explanation of Python basics. This will give you a strong foundation to start coding confidently.

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🐍 Python Basics (In Detail)

✅ 1. What Is Python?

Python is a high-level, easy-to-learn programming language used for:

• Web development
• Data analytics
• Machine learning
• Automation
• App development
• Cybersecurity
  …and much more.

Why Python is popular:
✔ Simple syntax
✔ Huge library support
✔ Very beginner-friendly

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✅ 2. Python Syntax Basics

(a) Printing Output

print("Hello, World!")

(b) Comments

Used to explain code.

# This is a single-line comment

"""
This is a multi-line comment
"""

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✅ 3. Python Variables

Variables store data.

name = "Meenu"
age = 22
salary = 50000.50

No need to declare type—Python detects automatically.

Common Data Types

Type	Example
int	10
float	10.5
str	"Hello"
bool	True
list	[1,2,3]
tuple	(1,2,3)
dict	{"name": "Meenu"}

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✅ 4. Input from User

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

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✅ 5. Operators

Arithmetic Operators

a = 10
b = 3
print(a + b)  # Addition
print(a - b)  # Subtraction
print(a * b)  # Multiplication
print(a / b)  # Division
print(a % b)  # Modulus
print(a ** b) # Exponent

Comparison Operators

a == b
a > b
a < b

Logical Operators

and
or
not

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✅ 6. Conditional Statements

if, elif, else

age = 18

if age > 18:
    print("Adult")
elif age == 18:
    print("Just became an adult")
else:
    print("Minor")

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✅ 7. Loops

(a) For Loop

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

(b) While Loop

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

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✅ 8. Python Data Structures

(a) List — ordered & changeable

fruits = ["apple", "banana", "mango"]
fruits.append("orange")

(b) Tuple — ordered but not changeable

colors = ("red", "green", "blue")

(c) Set — unordered & unique values

nums = {1,2,3,3}

(d) Dictionary — key–value pairs

student = {
    "name": "Meenu",
    "age": 22
}

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✅ 9. Functions

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

greet("Meenu")

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✅ 10. Modules

Use pre-written code.

import math
print(math.sqrt(16))

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✅ 11. Exception Handling

To handle errors:

try:
    print(10/0)
except Zero DivisionError:
    print("You cannot divide by zero")

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I can give you: ✔ Python short notes
✔ Python roadmap
✔ Practice questions
✔ Real-world examples
✔ Mini projects

Just tell me “Send full Python notes” or “Give me exercises”.