Day 29 : How To Solve Swap Two Numbers Problem | 30 Days of Code Challenge

Tutorial Video : - https://youtube.com/shorts/_1CK2vS3ayM

Source Code : - https://github.com/TechbyWebCoder/Python_Problem

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Day 30 : How To Solve Trimorphic Number Problem | 30 Days of Code Challenge

Tutorial Video : - https://youtube.com/shorts/BV34hO4_Ahc

Source Code : - https://github.com/TechbyWebCoder/Python_Problem

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Top 10 Python Problem Challenge (For Beginner) | Part 1

Tutorial Video : - https://youtu.be/v5PeqzrW6UE

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Top 10 Python Problem Challenge (For Beginner) | Part 2

Tutorial Video : - https://youtu.be/xx1mO-OZAYQ

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Top 10 Python Problem Challenge (For Beginner) | Part 3

Tutorial Video : - https://youtu.be/UT0NwA4fmhI

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IMPORTANT PROBLEM CODE USING PYTHON 📽

(PYTHON PROBLEM PROGRAM)

1. 1 TO 10 PROGRAM
https://youtu.be/v5PeqzrW6UE

2. 11 TO 20 PROGRAM
https://youtu.be/xx1mO-OZAYQ

3. 21 TO 30 PROGRAM
https://youtu.be/UT0NwA4fmhI

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Important Web Developer And Programming Language Related Notes🔗

👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻

Topic :- Python (Basic To Advance All Functions With Example)

IMPORTANT PATTERN CODE USING PYTHON 📽

(30 INTERVIEW RELATED PATTERN PROGRAM)

1. STAR PATTERN PROGRAM
https://youtu.be/bxen7i1YRJ0?si=0kim8S0bG1Ee3ESl

2. NUMBER PATTERN PROGRAM
https://youtu.be/_5UaekFc2tw?si=efgKy3_AQIDCcYPk

3. ALPHABET PATTERN PROGRAM
https://youtu.be/V-lQ2MJ5KEk?si=mIY6XMMP_Jm4danw

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Important Web Developer And Programming Language Related Program🔗

👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻👇🏻

Topic :- Python (Top 30 Pattern Program With Source Code)

Correct Answer: B) 3

📘Explanation:

In Python, // is the floor division operator in Python.
It divides the numbers and returns the integer part (floor value).
So 10 // 3 gives 3, not 3.33.

React ❤️ if you got it Right

✅ Correct Answer: B) False

🧠 Explanation :

5 > 3 → True

2 < 1 → False

True and False → False

📌 Rule: and returns True only if both conditions are True.

React ❤️ if you got it Right

🐍 PYTHON – DAY 1 STUDY MATERIAL
✨ Topic: Introduction to Python & Installation

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📌 What is Python?

Python is a high-level, interpreted, and general-purpose programming language.
It is easy to learn and widely used in web development, data science, artificial intelligence, automation, and scripting.

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🎯 Why Learn Python?

✅ Easy to read and write
✅ Beginner-friendly syntax
✅ Huge library support
✅ Platform independent
✅ Used by top companies like Google, Netflix, Instagram

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⚙️ Features of Python

✔ Interpreted Language
✔ High-Level Language
✔ Object-Oriented
✔ Dynamically Typed
✔ Portable (Windows, Linux, Mac)
✔ Open Source and Free

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🔢 Python Versions

❌ Python 2 – Deprecated
✅ Python 3 – Recommended
👉 Always use Python 3

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💻 How to Install Python (Windows)

1️⃣ Visit 👉 https://www.python.org
2️⃣ Download Python 3.x
3️⃣ Select ☑ Add Python to PATH
4️⃣ Click Install
5️⃣ Verify installation using:
python --version

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🚀 Python Execution Modes

🔹 Interactive Mode
print("Hello Python")

🔹 Script Mode
Create file: hello.py
print("Hello Python")

Run using command:
python hello.py

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👋 First Python Program

print("Hello World")

🖨 Output:
Hello World

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🧠 Python Syntax Rules

• Python is case-sensitive
• Indentation is mandatory
• No semicolon required

Example:

if True:
print("Python is easy")

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💬 Comments in Python

🔹 Single-line comment
This is a comment

🔹 Multi-line comment
"""
This is
a multi-line
comment
"""
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📝 Practice Tasks – Day 1

✔ Install Python
✔ Run Python in interactive mode
✔ Write your first Python program
✔ Print your name using Python

Example:
print("My name is Soham")

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🎯 Day 1 Goal

✔ Understand Python basics
✔ Install Python successfully
✔ Run your first Python program

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📅 Next Topic – Day 2
🔥 Variables & Data Types
✨ Stay Connected | Keep Coding
🚀 TechByWebCoder


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🐍 PYTHON – DAY 2 STUDY MATERIAL
✨ Topic: Variables & Data Types

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📌 What is a Variable?
A variable is a name given to a memory location used to store data in a program.
Python variables do not need data type declaration.

Example:
x = 10
name = "Python"

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🧠 Rules for Naming Variables

✔ Must start with a letter (a–z, A–Z) or underscore (_)
✔ Can contain letters, numbers, and underscore
❌ Cannot start with a number
❌ Cannot use keywords

Valid:
my_var, _count, total1

Invalid:
1total, my-var, class

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⚙️ Dynamic Typing in Python

Python automatically decides the data type based on the value.

Example:
x = 10
x = "Hello"

Same variable, different data type ✔

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🔢 Data Types in Python

📍 Integer (int)
Stores whole numbers
Example:
a = 25

📍 Float (float)
Stores decimal numbers
Example:
b = 10.5

📍 String (str)
Stores text or characters
Example:
name = "Python"

📍 Boolean (bool)
Stores True or False
Example:
is_active = True

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🔍 Check Data Type

Use type() function

Example:
x = 10
print(type(x))

Output:
<class 'int'>

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🔁 Type Conversion (Type Casting)

📌 Convert to Integer
int(10.5) → 10

📌 Convert to Float
float(5) → 5.0

📌 Convert to String
str(100) → "100"

Example:
x = int("20")
y = float(5)

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📥 User Input in Python

Python takes input as string by default.

Example:
name = input("Enter your name: ")
print(name)
Input with type conversion:
age = int(input("Enter age: "))

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🧮 Multiple Assignment

Example:
a, b, c = 10, 20, 30
Same value assignment:
x = y = z = 5

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📝 Practice Tasks – Day 2

✔ Create variables of different data types
✔ Use type() to check data type
✔ Take user input for name and age
✔ Convert string input to integer

Example Program:
name = input("Enter name: ")
age = int(input("Enter age: "))
print(name, age)

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🎯 Day 2 Goal

✔ Understand variables
✔ Learn Python data types
✔ Take user input confidently

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📅 Next Topic – Day 3
🔥 Operators in Python
✨ Stay Connected | Keep Coding
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🐍 PYTHON – DAY 3 STUDY MATERIAL
✨ Topic: Operators in Python

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📌 What are Operators?
Operators are symbols used to perform operations on variables and values.

Example:
a = 10
b = 5
c = a + b

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➕ Arithmetic Operators

Addition
Subtraction
Multiplication
/ Division
% Modulus
** Exponent
// Floor Division

Example:
a = 10
b = 3
print(a + b) # 13
print(a % b) # 1
print(a ** b) # 1000
print(a // b) # 3

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🟰 Assignment Operators

= Assign
+= Add and assign
-= Subtract and assign
*= Multiply and assign
/= Divide and assign

Example:
x = 10
x += 5
print(x) # 15

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🔍 Comparison Operators

== Equal to
!= Not equal
Greater than
< Less than
= Greater than or equal
<= Less than or equal

Example:
a = 10
b = 5
print(a > b) # True
print(a == b) # False

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🧠 Logical Operators

and → True if both conditions are True
or → True if any condition is True
not → Reverses the result

Example:

a = 10
print(a > 5 and a < 20)
print(a > 5 or a > 20)
print(not(a > 5))

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🔗 Membership Operators

in → True if value is present
not in → True if value is not present

Example:
nums = [1, 2, 3, 4]
print(3 in nums)
print(5 not in nums)

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🆔 Identity Operators

is → True if both refer to same object
is not → True if different objects

Example:
a = 10
b = 10
print(a is b)

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📝 Practice Tasks – Day 3

✔ Perform all arithmetic operations
✔ Compare two numbers
✔ Use logical operators with conditions
✔ Check membership in a list

Example Program:
a = int(input("Enter a number: "))
b = int(input("Enter another number: "))
print(a > b)

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🎯 Day 3 Goal

✔ Understand all Python operators
✔ Use operators in real programs

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📅 Next Topic – Day 4
🔥 Conditional Statements (if, if-else)
✨ Stay Connected | Keep Coding
🚀 TechByWebCoder

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🐍 PYTHON – DAY 4 STUDY MATERIAL
✨ Topic: Conditional Statements (if, if-else)

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📌 What are Conditional Statements?
Conditional statements are used to make decisions in a program based on conditions.
Python executes code only if the condition is True.

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🔹 if Statement
Used to execute a block of code when a condition is True.

Syntax:
if condition:
statement

Example:
age = 18
if age >= 18:
print("Eligible to vote")

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🔹 if-else Statement
Used when two conditions are possible.

Syntax:
if condition:
statement
else:
statement

Example:
num = 5
if num % 2 == 0:
print("Even number")
else:
print("Odd number")

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🔹 Indentation in Python

Indentation defines code blocks in Python.
Incorrect indentation causes errors.

Correct:
if True:
print("Python")

Wrong:
if True:
print("Python")

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🔹 Relational Operators with if
You can use comparison operators inside conditions.

Example:
a = 10
b = 20
if a < b:
print("b is greater")

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🔹 Multiple Conditions using Logical Operators

Example:
age = 25
if age >= 18 and age <= 60:
print("Eligible")

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📝 Practice Tasks – Day 4

✔ Check whether a number is positive or negative
✔ Check even or odd number
✔ Check voting eligibility
✔ Compare two numbers

Example Program:
num = int(input("Enter a number: "))
if num >= 0:
print("Positive number")
else:
print("Negative number")

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🎯 Day 4 Goal

✔ Understand decision making in Python
✔ Use if and if-else confidently

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📅 Next Topic – Day 5
🔥 if-elif-else & Nested Conditions
✨ Stay Connected | Keep Coding
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🐍 PYTHON – DAY 5 STUDY MATERIAL
✨ Topic: if-elif-else & Nested Conditions

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📌 What is if-elif-else?

The if-elif-else statement is used when multiple conditions need to be checked.
Python checks conditions from top to bottom and executes the first True block.

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🔹 if-elif-else Syntax

if condition1:
statement
elif condition2:
statement
elif condition3:
statement
else:
statement

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🔹 Example: Grade System

marks = 85
if marks >= 90:
print("Grade A")
elif marks >= 75:
print("Grade B")
elif marks >= 60:
print("Grade C")
else:
print("Fail")

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🔹 Nested if Statement
An if inside another if is called nested if.

Example:
age = 20
if age >= 18:
if age <= 60:
print("Eligible")
else:
print("Over age limit")
else:
print("Not eligible")

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🔹 Logical Operators with Conditions
Logical operators can reduce nested conditions.

Example:
age = 25
if age >= 18 and age <= 60:
print("Eligible")

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🔹 Common Mistakes

❌ Using wrong indentation
❌ Missing colon (:)
❌ Wrong condition order

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📝 Practice Tasks – Day 5

✔ Create a grade calculator
✔ Check eligibility using nested if
✔ Find largest of three numbers
✔ Convert nested if into logical condition

Example Program:
a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
c = int(input("Enter third number: "))
if a > b and a > c:
print("a is largest")
elif b > c:
print("b is largest")
else:
print("c is largest")

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🎯 Day 5 Goal

✔ Handle multiple conditions
✔ Write clean conditional logic

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📅 Next Topic – Day 6
🔥 while Loop in Python
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🐍 PYTHON – DAY 6 STUDY MATERIAL
✨ Topic: while Loop in Python

━━━━━━━━━━━━━━━━━━━

📌 What is a Loop?
A loop is used to repeat a block of code multiple times until a condition becomes False.

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🔁 What is while Loop?

The while loop executes a block of code as long as the condition is True.

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🔹 Syntax of while Loop

while condition:
statement
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🔹 Example: Print Numbers 1 to 5

i = 1
while i <= 5:
print(i)
i = i + 1
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🔹 Example: Sum of Numbers

i = 1
sum = 0
while i <= 5:
sum = sum + i
i = i + 1
print(sum)

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🔹 Infinite Loop
A loop that never ends is called an infinite loop.

Example (Avoid this):
while True:
print("Python")

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🔹 Common Mistakes in while Loop

❌ Forgetting to update loop variable
❌ Wrong condition
❌ Infinite loop

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📝 Practice Tasks – Day 6

✔ Print numbers from 1 to 10
✔ Print even numbers using while loop
✔ Find factorial of a number
✔ Reverse a number

Example Program:
num = int(input("Enter a number: "))
rev = 0
while num > 0:
digit = num % 10
rev = rev * 10 + digit
num = num // 10
print("Reverse:", rev)

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🎯 Day 6 Goal

✔ Understand repetition using while loop
✔ Avoid infinite loops

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📅 Next Topic – Day 7
🔥 for Loop in Python
✨ Stay Connected | Keep Coding
🚀 TechByWebCoder

🐍 PYTHON – DAY 7 STUDY MATERIAL
✨ Topic: for Loop in Python

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📌 What is for Loop?
The for loop is used to iterate over a sequence such as a list, tuple, string, or range.

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🔹 Syntax of for Loop
for variable in sequence:
statement

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🔹 Using range() Function

range() generates a sequence of numbers.
range(start, stop, step)

Example:
for i in range(1, 6):
print(i)

Output:
1 2 3 4 5

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🔹 Example: Print Even Numbers

for i in range(2, 11, 2):
print(i)

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🔹 Looping Through a String
for ch in "Python":
print(ch)

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🔹 Nested for Loop
A for loop inside another for loop.

Example:
for i in range(1, 4):
for j in range(1, 4):
print(i, j)

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🔹 Difference Between for and while Loop

• for loop is used when number of iterations is known
• while loop is used when condition is unknown

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📝 Practice Tasks – Day 7

✔ Print numbers from 1 to 10
✔ Print multiplication table
✔ Print characters of a string
✔ Create star pattern using nested loop

Example Program:
for i in range(1, 6):
print("*" * i)

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🎯 Day 7 Goal
✔ Master iteration using for loop
✔ Use range() confidently

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📅 Next Topic – Day 8
🔥 break, continue & pass Statements
✨ Stay Connected | Keep Coding
🚀 TechByWebCoder