Representing Numbers and Letters with Binary: Crash Course Computer Science #4


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Today, we’re going to take a look at how computers use a stream of 1s and 0s to represent all of our data – from our text messages and photos to music and webpages. We’re going to focus on how these binary values are used to represent numbers and letters, and discuss how our need to perform operations on larger and more complex values brought us from our 8-bit video games to beautiful Instagram photos, and from unreadable garbled text in our emails to a universal language encoding scheme.

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  1. Albin Sopaj says

    1 KB (kilobytes) = 1000 bytes (10^3)1KiB (kibibytes) = 1024 bytes (2^10)Due to confusion computer architects have now defined a new term "kibibyte" to represent powers of 2, whereas the "kilobyte" represents powers of 10.

  2. Aubrée Swart says

    You can tell you’re really passionate about what you’re teaching, and I love that

  3. Adam Szava says

    But what if you want to use the value 97 instead of “a” how does the system know you are trying to say “a” instead of just the number 97

  4. theonlinerover says

    My brain is now starting to crack lol. But will study binary math later and keep going anyway :))

  5. ino akira says

    I can’t stop staring at her eyes following the prompt. She covers it up well but it’s still noticeable. These actors are getting good at this stuff.

  6. P. L. D. A says

    I wish I found this channel when I was still a student.

  7. Aee Bee Cee says

    So this episode is talking about data type, right? Discuss about how to represent different types of data in binary, using different encoding formats to represent different types of data.

  8. All Things Prettie by Donna says

    im 13 yrs old. this is not the stuff to watch and not take notes. take notes on the most topics in the video, because this is very complex. also, 1 tip for learning is to change your state of mind. drink some water, be passionate about the subject and be curious of the pc world. also, if you studied this in recent years, pretend you forgot everything so that you can learn new things while having the right state of mind. Im only 13, but this has worked on me and may work on you. This is how I learn complex studies.

  9. Matthew Ascough says

    she is so annoying

  10. Sonom Rubayat says

    for the first time i had to slower the speed 🙂

  11. Robert Maclean says

    Accentuated characters I think you mean accented characters as in French

  12. Robert Maclean says

    A BYTE is NOT necessarily 8 bits it can be 6 bits or four bits with is called a nibble half a byte

  13. 1000instruments Girl says

    Suddenly Matrix makes all the sense in the wolrd 🙂

  14. Aee Bee Cee says

    We can base different notation systems to represent the same amount of 1’s

  15. Aee Bee Cee says

    Math is associated with social changes In decimal 1 cent values 1cent, 1 bread values 10 cents, 1 cake values 10 breads, 1 pizza values 10 cakes and so on…In binary1cent values 1cent, 1 bread values 2 cents, 1 cake values 2 breads, 1 pizza values 2 cakes and so on…

  16. Maria McNeill says

    you talk very fast….

  17. Matthew Moore says

    "Not everything is a positive number. Like my bank account in college!"

  18. EnigmatikNeko says

    She says 5 bit able to store 32 values? It only has 31 no?

  19. Vinnie P. says

    I have so much trouble with understanding computers but it seems really freakin important in this day and age

  20. Fares AlHawaj says

    I hit like before watching the video, and, as always, Crash Course didn’t disappoint me??

  21. poppa code says

    5:30 unfortunately, if they can compute a bigger debt they most certainly will try to grow it exponentially.

  22. Chris Pagliuca says

    Do you want to hear a not not joke? Yes-No, No -Yes

  23. Alanisisamess says

    I'm pretty sure mojibake is not moejibakkay 😛

  24. Kenny Noel says

    @3:38 What idiot video chats in the Tub with a Laptop. Dafuk?

  25. Shweta Walunj says

    Population of our country reach 131 cr. And hence to get admission to commuter science in high colleges in our country is very hard . So our will not be able to admission to c.s., ??????????????

  26. 周宇洋 says

    The asian keyboard shown in video is taiwanese computer ,the mainland keyboard is same as english since we have already imported alphabet system to mandarin while taiwanese don't.

  27. aYvya 에이와이 says

    Thank you very much ! 🙂

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