Day 6: Working with Lists

Task

Understand and manipulate lists in Python.

Description

Lists are a versatile data structure in Python that allow you to store and manipulate an ordered collection of items. You can add, remove, and access items in a list, making them useful for a wide range of tasks. Lists are defined using square brackets [], and items are separated by commas.

Key Concepts

  • Creating Lists: Define a list using square brackets.
  • Accessing Elements: Use indices to access specific items in a list.
  • Adding Elements: Use append() to add items at the end of the list.
  • Removing Elements: Use remove() to delete items from the list.
  • List Length: Use len() to find the number of items in a list.

Example

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# Define a list of fruits
fruits = ["apple", "banana", "cherry"]

# Access and print the first item
print("First fruit:", fruits[0])

# Add a new fruit to the list
fruits.append("orange")
print("Fruits after adding orange:", fruits)

# Remove a fruit from the list
fruits.remove("banana")
print("Fruits after removing banana:", fruits)

# Find the number of items in the list
print("Number of fruits:", len(fruits))

Output

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First fruit: apple
Fruits after adding orange: ['apple', 'banana', 'cherry', 'orange']
Fruits after removing banana: ['apple', 'cherry', 'orange']
Number of fruits: 3