📚 List Data Type

Last Updated: 17th August 2025

  • A list is an ordered collection of items stored in a single variable.
  • Lists are mutable (you can change them) and allow duplicates.
  • Lists use square brackets [].
  • All the indexing and slicing operations work on lists.
  • Store multiple data types items in a single variable.

    Hinglish Tip 🗣: List ko socho ek bucket jaise — items ek order me rakhe hote hain aur tum badal bhi sakte ho (add, remove, update).

✏ Creating Lists

empty = [] # or empty = list()
numbers = [10, 20, 30]
fruits = ["apple", "banana", "cherry"]
mixed = [1, "hello", 3.5, True]
print(type(empty))

🔎 Accessing Elements (Indexing)

fruits = ["apple", "banana", "cherry"]
print(fruits[0])   # apple
print(fruits[-1])  # cherry

🔁 Slicing

nums = [10,20,30,40,50]
print(nums[1:4])   # [20,30,40]
print(nums[:3])    # [10,20,30]
print(nums[::2])   # [10,30,50]
print(nums[::-1])  # reversed list

✍️ Modifying Lists

fruits = ["apple", "banana", "cherry"]
fruits[1] = "kiwi"
print(fruits)  # ['apple', 'kiwi', 'cherry']

Loop over Lists

fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

# Use of index
for i in range(len(fruits)):
    print(fruits[i])

Unpacking Lists

fruits = ["apple", "banana", "cherry"]
a, b, c = fruits
print(a)  # apple
print(b)  # banana
print(c)  # cherry

💡 Quick Practice

  • Create a list of your favorite fruits.
  • Access the first and last fruits in the list.
  • Modify the second fruit in the list.
  • Loop through the list and print each fruit.
  • Exercise
← PreviousNext →