L9: 🐍Conditional Statements in Python | if, if-else, elif, Nested if & Match Case Explained
Description: 🐍 Welcome to Carrier With Code (CWC)
Welcome to the Python Programming Complete Course.
In this lecture, we will learn about Conditional Statements and Decision Making in Python.
Conditional statements allow a program to make decisions based on conditions. Depending on whether a condition is True or False, Python can execute different blocks of code.
In this video, we will learn if, if-else, elif, Nested if, and Match Case with simple and practical examples.
📚 Topics Covered in This Video
✅ Decision Making in Python
✅ if Statement
✅ if-else Statement
✅ elif Statement
✅ Nested if
✅ Match Case
✅ Practical Examples
✅ Real-Life Decision-Making Examples
🟢 1. if Statement
The if statement is used to execute a block of code when a condition is True.
Syntax
if condition:
statement
Example
age = 20
if age = 18:
print("You are eligible to vote")
Output:
You are eligible to vote
🔵 2. if-else Statement
The if-else statement is used when we have two possible outcomes.
If the condition is True, the if block executes.
If the condition is False, the else block executes.
Example
age = 16
if age = 18:
print("Eligible to vote")
else:
print("Not eligible to vote")
Output:
Not eligible to vote
🟡 3. elif Statement
The elif statement is used when we need to check multiple conditions.
Syntax
if condition1:
statement
elif condition2:
statement
else:
statement
Example – Marks
marks = 85
if marks = 90:
print("Grade A+")
elif marks = 80:
print("Grade A")
elif marks = 70:
print("Grade B")
else:
print("Grade C")
Output:
Grade A
🟠 4. Nested if
A Nested if means using one if statement inside another if statement.
Example
age = 20
has_id = True
if age = 18:
if has_id:
print("Entry allowed")
else:
print("ID required")
else:
print("Entry not allowed")
Output:
Entry allowed
Easy Definition
if inside another if = Nested if
🔴 5. Match Case
match-case is used to compare a value against different patterns or cases.
It is similar to the switch statement found in many other programming languages.
Example
day = 2
match day:
case 1:
print("Monday")
case 2:
print("Tuesday")
case 3:
print("Wednesday")
case _:
print("Invalid day")
Output:
Tuesday
Here, _ works as a default case when no other case matches.
💻 Practical Example – Even or Odd
num = int(input("Enter a number: "))
if num % 2 == 0:
print("Even Number")
else:
print("Odd Number")
This program demonstrates decision-making using if-else.
🎓 Practical Example – Positive, Negative or Zero
num = int(input("Enter a number: "))
if num =0:
print("Positive")
elif num = 0:
print("Negative")
else:
print("Zero")
🧠 Easy Trick to Remember
if → One condition
if-else → Two choices
elif → Multiple conditions
Nested if → Condition inside condition
match-case → Match different values/patterns
🌍 Real-Life Examples
Conditional statements are used in:
🏦 Banking Systems
🎓 Student Grade Systems
🛒 Online Shopping
🔐 Login Systems
🎮 Games
🚦 Traffic Systems
💳 Payment Systems
📱 Mobile Applications
For example:
If balance is sufficient → make payment.
Else → show insufficient balance.
🎯 After This Lecture You Will Be Able To
✅ Understand Decision Making
✅ Use if statements
✅ Use if-else
✅ Handle multiple conditions using elif
✅ Create Nested if statements
✅ Use match-case
✅ Build condition-based programs
✅ Solve practical programming problems
🎓 This Lecture is Perfect For
✅ Python Beginners
✅ BCA Students
✅ B.Tech Students
✅ MCA Students
✅ Diploma Students
✅ Computer Science Students
✅ Python Lab Practice
✅ Semester Exam Preparation
✅ Placement Preparation
✅ Programming Beginners
❤️ Support Carrier With Code (CWC)
If this Python Programming Series is helping you:
👍 Like the video
💬 Comment your doubts
📢 Share with your friends
🔔 Subscribe to Carrier With Code (CWC)
Learn • Practice • Build • Grow 🚀
🔍 SEO Keywords
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#carrierwithcode Close description
Welcome to the Python Programming Complete Course.
In this lecture, we will learn about Conditional Statements and Decision Making in Python.
Conditional statements allow a program to make decisions based on conditions. Depending on whether a condition is True or False, Python can execute different blocks of code.
In this video, we will learn if, if-else, elif, Nested if, and Match Case with simple and practical examples.
📚 Topics Covered in This Video
✅ Decision Making in Python
✅ if Statement
✅ if-else Statement
✅ elif Statement
✅ Nested if
✅ Match Case
✅ Practical Examples
✅ Real-Life Decision-Making Examples
🟢 1. if Statement
The if statement is used to execute a block of code when a condition is True.
Syntax
if condition:
statement
Example
age = 20
if age = 18:
print("You are eligible to vote")
Output:
You are eligible to vote
🔵 2. if-else Statement
The if-else statement is used when we have two possible outcomes.
If the condition is True, the if block executes.
If the condition is False, the else block executes.
Example
age = 16
if age = 18:
print("Eligible to vote")
else:
print("Not eligible to vote")
Output:
Not eligible to vote
🟡 3. elif Statement
The elif statement is used when we need to check multiple conditions.
Syntax
if condition1:
statement
elif condition2:
statement
else:
statement
Example – Marks
marks = 85
if marks = 90:
print("Grade A+")
elif marks = 80:
print("Grade A")
elif marks = 70:
print("Grade B")
else:
print("Grade C")
Output:
Grade A
🟠 4. Nested if
A Nested if means using one if statement inside another if statement.
Example
age = 20
has_id = True
if age = 18:
if has_id:
print("Entry allowed")
else:
print("ID required")
else:
print("Entry not allowed")
Output:
Entry allowed
Easy Definition
if inside another if = Nested if
🔴 5. Match Case
match-case is used to compare a value against different patterns or cases.
It is similar to the switch statement found in many other programming languages.
Example
day = 2
match day:
case 1:
print("Monday")
case 2:
print("Tuesday")
case 3:
print("Wednesday")
case _:
print("Invalid day")
Output:
Tuesday
Here, _ works as a default case when no other case matches.
💻 Practical Example – Even or Odd
num = int(input("Enter a number: "))
if num % 2 == 0:
print("Even Number")
else:
print("Odd Number")
This program demonstrates decision-making using if-else.
🎓 Practical Example – Positive, Negative or Zero
num = int(input("Enter a number: "))
if num =0:
print("Positive")
elif num = 0:
print("Negative")
else:
print("Zero")
🧠 Easy Trick to Remember
if → One condition
if-else → Two choices
elif → Multiple conditions
Nested if → Condition inside condition
match-case → Match different values/patterns
🌍 Real-Life Examples
Conditional statements are used in:
🏦 Banking Systems
🎓 Student Grade Systems
🛒 Online Shopping
🔐 Login Systems
🎮 Games
🚦 Traffic Systems
💳 Payment Systems
📱 Mobile Applications
For example:
If balance is sufficient → make payment.
Else → show insufficient balance.
🎯 After This Lecture You Will Be Able To
✅ Understand Decision Making
✅ Use if statements
✅ Use if-else
✅ Handle multiple conditions using elif
✅ Create Nested if statements
✅ Use match-case
✅ Build condition-based programs
✅ Solve practical programming problems
🎓 This Lecture is Perfect For
✅ Python Beginners
✅ BCA Students
✅ B.Tech Students
✅ MCA Students
✅ Diploma Students
✅ Computer Science Students
✅ Python Lab Practice
✅ Semester Exam Preparation
✅ Placement Preparation
✅ Programming Beginners
❤️ Support Carrier With Code (CWC)
If this Python Programming Series is helping you:
👍 Like the video
💬 Comment your doubts
📢 Share with your friends
🔔 Subscribe to Carrier With Code (CWC)
Learn • Practice • Build • Grow 🚀
🔍 SEO Keywords
conditional statements in python
conditional statements python
decision making in python
if statement in python
if else statement in python
elif statement in python
nested if in python
match case in python
match case python example
python if else
python elif
python nested if
python decision making
conditional statements with examples
python conditions
python programming for beginners
python basics
python tutorial
python complete course
python programming course
python practical
python lab practical
python for bca students
python exam preparation
python interview questions
learn python from scratch
Carrier With Code
📚 Hashtags
#Python
#ConditionalStatements
#DecisionMaking
#PythonIf
#PythonIfElse
#PythonElif
#NestedIf
#MatchCase
#PythonProgramming
#PythonBasics
#PythonForBeginners
#LearnPython
#PythonTutorial
#PythonCourse
#Coding
#Programming
#BCA
#ComputerScience
#PythonPractical
#CarrierWithCode
#carrierwithcode Close description