Name: Coding Challenge #120: Bit Shifting
Uploaded: 2020-04-06T07:57:56.000Z
Duration: 17 min 52 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

Gerund

- Hello and welcome to coding challenge bit shifting.

of this coding challenge series about binary numbers

in the seven segment display video coding challenge

and then everybody asking, "What was that that you did?

"This shifting and masking makes no sense to me."

if you actually managed to watch that video,

So, this is a single byte with eight bits.

all of it off, I have a zero, this is one,

this is two, this is three, this is four,

so I can just toggle these bits on and off

and get the decimal representation of that number.

What I want to do now is add bit shifting to this.

Well, I know what it is, why would you want to do it?

Well, I needed to do it with my seven segment challenge,

so maybe that's the reason why you'd want to do it.

But let's, okay, let's say for the sake of argument

So, first of all, I need to convert this into decimal,

just to, I mean, I don't need to to do bit shifting,

This is one, so this is two, plus eight, plus 16,

So, bit shifting, when you take any number,

like the number 90, you can ask for the computer

to think about it in binary, which it's already doing!

That's actually what it's doing, and shift the bits around.

and I could say shift by a certain amount.

So let's say I just say shift to the right by one,

so this is bit shifting, and what that actually does

that's a zero, one, one, that's a zero, this is a one.

Shifting the bits over by one is actually

Think about the powers of two and how binary numbers work.

So, this is what bit shifting basically does.

So, in theory, does, when you say 90 divided by two,

I don't know, maybe, but this is actually,

Of course, you can only do it with integers,

are represented as bits is a whole other discussion,

but now, what we can do is let's add this feature

I can shift by four bits, et cetera, but, alright.

like, wouldn't there be some bit over here to shift in?

all of these would be zeroes, so you can always assume

and basically gets removed, so by the way,

and divide this, we would get, what would we get?

the integer value of dividing that by two,

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Coding Challenge #120: Bit Shifting

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