🔹 1. Lists in Python

What is a List?

A list is a collection of multiple values stored in square brackets [ ].

✔ Ordered
✔ Changeable (mutable)
✔ Allows duplicate values

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Example 1: Creating a List

students = ["Sameer", "Ayesha", "Saddam", "Chandini"]print(students)

Output

['Sameer', 'Ayesha', 'Saddam', 'Chandini']

📌 Explanation

• List stores multiple values in one variable.

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Example 2: Accessing List Elements

students = ["Sameer", "Ayesha", "Saddam"]print(students[0])
print(students[2])

Output

Sameer
Saddam

📌 Explanation
List indexing starts from 0.

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Example 3: Changing List Values

students = ["Sameer", "Ayesha", "Saddam"]students[1] = "Gousya"print(students)

Output

['Sameer', 'Gousya', 'Saddam']

📌 Explanation
Lists are mutable, so values can be changed.

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Example 4: Adding Items

students = ["Sameer", "Ayesha"]students.append("Chandini")print(students)

Output

['Sameer', 'Ayesha', 'Chandini']

📌 Explanation
append() adds an item to the end of the list.

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Example 5: Removing Items

students = ["Sameer", "Ayesha", "Saddam"]students.remove("Ayesha")print(students)

Output

['Sameer', 'Saddam']

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Example 6: List Length

students = ["Sameer", "Ayesha", "Saddam"]print(len(students))

Output

3

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Example 7: Loop Through List

students = ["Sameer", "Ayesha", "Gousya"]for student in students:
    print(student)

Output

Sameer
Ayesha
Gousya

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🔹 2. Tuples in Python

What is a Tuple?

A tuple is a collection stored in parentheses ( ).

✔ Ordered
✔ Not changeable (immutable)
✔ Allows duplicates

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Example 8: Creating a Tuple

students = ("Sameer", "Ayesha", "Saddam")print(students)

Output

('Sameer', 'Ayesha', 'Saddam')

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Example 9: Access Tuple Elements

students = ("Sameer", "Ayesha", "Saddam")print(students[1])

Output

Ayesha

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Example 10: Tuple Length

students = ("Sameer", "Ayesha", "Saddam")print(len(students))

Output

3

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Example 11: Loop Through Tuple

students = ("Sameer", "Ayesha", "Gousya")for student in students:
    print(student)

Output

Sameer
Ayesha
Gousya

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Example 12: Tuple Cannot Be Changed

students = ("Sameer", "Ayesha", "Saddam")students[1] = "Gousya"

Output

TypeError: 'tuple' object does not support item assignment

📌 Explanation
Tuples are immutable.

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🔹 3. Sets in Python

What is a Set?

A set is a collection stored in curly brackets { }.

✔ Unordered
✔ No duplicate values
✔ Mutable

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Example 13: Creating a Set

students = {"Sameer", "Ayesha", "Saddam"}print(students)

Output

{'Sameer', 'Ayesha', 'Saddam'}

📌 Order may change because sets are unordered.

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Example 14: Duplicate Values Removed

students = {"Sameer", "Ayesha", "Sameer"}print(students)

Output

{'Sameer', 'Ayesha'}

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Example 15: Adding Item to Set

students = {"Sameer", "Ayesha"}students.add("Chandini")print(students)

Output

{'Sameer', 'Ayesha', 'Chandini'}

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Example 16: Removing Item

students = {"Sameer", "Ayesha", "Saddam"}students.remove("Ayesha")print(students)

Output

{'Sameer', 'Saddam'}

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🔹 4. Difference Between List, Tuple, and Set

Feature	List	Tuple	Set
Brackets	[ ]	( )	{ }
Ordered	✔	✔	❌
Changeable	✔	❌	✔
Duplicate values	✔	✔	❌

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🔹 5. Real-Life Example

Student Registration

students = ["Sameer", "Ayesha", "Gousya"]students.append("Chandini")for student in students:
    print("Registered:", student)

Output

Registered: Sameer
Registered: Ayesha
Registered: Gousya
Registered: Chandini