1. Data Types

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1️⃣ Core Differences

Feature	List	Tuple	Set
Ordered	✅	✅	❌
Allows Duplicates	✅	✅	❌
Mutable (modifiable)	✅	❌	✅
Index Access	✅	✅	❌
Syntax	[1, 2, 3]	(1, 2, 3)	{1, 2, 3}

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2️⃣ When to Use What

• List
  • Need order + duplicates
  • Need to modify data
  • Most commonly used
• Tuple
  • Data should not change
  • Safer and faster than lists
  • Example: fixed values like dates, coordinates
• Set
  • Need only unique values
  • Fast duplicate removal
  • Order does not matter

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3️⃣ Key Examples

Remove duplicates using set

nums = [1, 2, 2, 3]
unique = list(set(nums))

Lists are mutable

l = [1, 2]
l.append(3)

Tuples are immutable

t = (1, 2)
t[0] = 5  # ❌ error

Sets have no index no duplicates

s = {1, 2, 3, 3}
print(s) # {1, 2, 3}
s[0]  # ❌ error

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