Cs 50

Week 1.1 (Monday)

ENGLISH ORIGINAL TEXT УКРАЇНСЬКИЙ ПЕРЕКЛАД

DAVID J. MALAN: So this is CS50. And this was CS50's own Colton Ogden, for more of who's music you can download at soundcloud.com/cs50. So today we focus all the more on the art of programming. And we take where we left off last week, focusing on Scratch, which was this graphical programming language. And take things down to a lower level, using a more traditional programming language known as C. But along the way, realizing that the same ideas we talked about last Friday will recur not only in this language C, but in most every other that we look at this semester. So we called this thing here what last time? This is representative of a statement. So we called this a statement. And it does something. It's an instruction that a computer or Scratch might execute. And henceforth, let's also start calling something like this a function, for reasons we shall soon see. Meanwhile, we saw things like this. And these are generally known as what construct? AUDIENCE: Loop. DAVID J. MALAN: So a loop. So pretty straightforward. It literally does what it says. And in Scratch, if you want to cram more puzzle pieces in there, the piece will grow to fit it. And we'll see in C that we can do the same thing. Another type of loop, though, in Scratch might be forever, or there's any number of other approaches. But let's take a more generalist look, with a face that's likely quite familiar, at loops more generally. MARK ZUCKERBERG: One thing that computers are really good at is repeating commands. As a person, you'd get really bored if you had to do the same thing lots of times in a row. But a computer can do the same thing millions or even billions of times, and not get bored, and be able to carry that out really well. So for example, if I wanted to wish everyone on Facebook a happy birthday by sending them an email, it might take me more than a century to actually write out all of those emails to everyone. But with...