4 built-in data types

In Python, lists, sets, tuples, and dictionaries are used to store collections of data. Each has different properties and use cases.

• set: an ordered, immutable collection that allows duplicate values.
  It can contain different data types:
  ✅ numbers, strings, booleans, lists, dictionaries, and even other tuples.
  ❌ cannot directly contain mutable objects like lists as elements.
  
  Use tuples when data should not be modified. Tuples are faster than lists.

employee = ('John Doe', 30, 5.9)
employee[0] # 'John Doe'

for i in employee:
  print(i) # John Doe
           # 30
           # 5.9

name, age, height = employee
print(f"{name.title()} is {age} years old and {height}\" tall.") # John Doe is 30 years old and 5.9" tall.

# tuples are immutable
employee[0] ='Jack Smith' # error message