Lists & strings in Python | Khan Academy - 2D lists | Intro to CS - Python | Khan Academy

Nested lists can model game boards, images, matrices, and more! Learn how to access the rows and columns of a 2D list. Use nested for loops to iterate over every element, in order. View the program used in this video at: https://www.khanacademy.org/python-program/2d-lists/5297593753124864 Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course! Course link: https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:analyzing-data-with-dictionaries Course playlist: https://www.youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5 Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc TIMESTAMPS: 00:00 : modeling a tic-tac-toe board 00:31 : accessing a 2D list 01:29 : 2D list use cases 02:08 : pixels 02:35 : iterating over a 2D list 03:10 : tracing nested loops 04:59 : mutating a 2D list 06:03 : rows with different lengths