lists

1. len(): Returns the number of elements in a list.
   • numbers = [1, 2, 3, 4, 5]
   • length = len(numbers)
   • print(length) # Output: 5
2. append(): Adds an element to the end of a list.
   • fruits = ["apple", "banana"]
   • fruits.append("cherry")
   • print(fruits) # Output: ["apple", "banana", "cherry"]
3. insert(): Inserts an element at a specific index in the list.
   • fruits = ["apple", "banana", "cherry"]
   • fruits.insert(1, "grape")
   • print(fruits) # Output: ["apple", "grape", "banana", "cherry"]
4. remove(): Removes the first occurrence of a specified element from the list.
   • fruits = ["apple", "banana", "cherry"]
   • fruits.remove("banana")
   • print(fruits) # Output: ["apple", "cherry"]
5. pop(): Removes and returns the last element of the list or an element at a specific index.
   • fruits = ["apple", "banana", "cherry"]
   • popped = fruits.pop()
   • print(popped) # Output: "cherry"
6. index(): Returns the index of the first occurrence of a specified element in the list.
   • fruits = ["apple", "banana", "cherry"]
   • index = fruits.index("banana")
   • print(index) # Output: 1
7. count(): Returns the number of occurrences of a specified element in the list.
   • fruits = ["apple", "banana", "cherry", "banana"]
   • count = fruits.count("banana")
   • print(count) # Output: 2
8. sort(): Sorts the list in ascending order (in-place modification).
   • numbers = [3, 1, 4, 2, 5]
   • numbers.sort()
   • print(numbers) # Output: [1, 2, 3, 4, 5]
9. reverse(): Reverses the order of elements in the list (in-place modification).
   • numbers = [1, 2, 3, 4, 5]
   • numbers.reverse()
   • print(numbers) # Output: [5, 4, 3, 2, 1]

These are just a few examples of the functions and methods available for manipulating lists in Python. Python provides many more built-in functions and additional methods to work with lists effectively.