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if statements | Intro to CS - Python | Khan Academy

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Learn how to branch control flow with conditionals. Trace the execution of an if statement to understand how the computer chooses which line of code to execute next.
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!
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!
TIMESTAMPS:
00:00 - 00:23 : what is a conditional?
00:24 - 00:51 : if statement syntax
00:52 - 01:16 : if statement execution
01:17 - 01:46 : num_orders example
01:47 - 02:57 : tracing True and False cases
02:58 - 03:38 : example in the code editor
03:39 - 04:37 : testing all possible branches
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course!
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!
TIMESTAMPS:
00:00 - 00:23 : what is a conditional?
00:24 - 00:51 : if statement syntax
00:52 - 01:16 : if statement execution
01:17 - 01:46 : num_orders example
01:47 - 02:57 : tracing True and False cases
02:58 - 03:38 : example in the code editor
03:39 - 04:37 : testing all possible branches