Python’s built-in functions are powerful tools that can significantly simplify and streamline your code when working with collections, such as lists, tuples, sets, and dictionaries.
In this article, we’ll explore some of the most useful built-in functions and how they can help you become a more efficient Python programmer.
Exploring the Power of Built-in Functions
1. len(): Determining the Size of Collections
The len() function is a fundamental tool for working with collections in Python. It allows you to quickly determine the number of elements in a list, tuple, set, or dictionary. This information can be crucial for tasks like iterating over a collection or ensuring that your data is within the expected size.
# Example usage
my_list = [1, 2, 3, 4, 5]
print(len(my_list)) # Output: 5
