Lists & strings in Python | Khan Academy - Program design: screen time | Intro to CS - Python | Khan Academy

Code along with a software engineer in this worked example using lists. Apply list iteration to analyze daily screen time usage across different apps. Define functions with list parameters to count the total number of active minutes and the total number of distinct phone sessions. View the program used in this video at: https://www.khanacademy.org/python-program/screen-time-lists-program-design/5111855196520448 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:automating-tasks-with-lists 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 : monitoring screen time 00:34 : data format 00:58 : count minutes function 01:53 : smaller test cases 02:21 : excluding work apps 02:59 : count sessions function 03:41 : first and last session test cases 04:37 : average session length function 05:00 : zero division error 05:24 : final data analysis