Tracing variables | Intro to CS - Python | Khan Academy

Trace a program with variables to understand how the computer interprets assignment statements, variable accesses, and variable expressions.

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 - 01:15 : gene = "BRCA2"
01:16 - 01:59 : num_mutations = 4 + 5 + 2
02:00 - 02:51 : print(gene + "gene")
02:52 - 03:45 : num_mutations = num_mutations + 1
03:46 - 04:30 : gene = num_mutations
04:31 - 05:09 : num_mutations = gene + 5
05:10 - 05:32 : print(num_mutations + gene)
05:33 - 05:46: program termination

[Karen-qrnu]

I'm taking four bootcamps right now plus this course and this is my favorite. Incredibly good instructor.

[ukanaikpe]

best tutorial out there i wish many knew about this, This is far better than what is taught by others on youtube

[mattetor]

Excellent videoes and way to teach this topic!

[rogerioribeiro]

So gene was a string at first then later it was assigned as an integer, can we change like that?

[Ny_babs]

A moment for all of the breast cancer families out there.