All language subtitles for 1_Computer Language

Remember when I said that a
computer is a device that

stores and processes data
by performing calculations?

Whether you're creating

an artificial
intelligence that can be

humans at chess or

something more simple like
running a video game,

the more computing power
you have access to,

the more you can accomplish.

By the end of this lesson,

you'll understand what a
computer calculates and how.

Let's look at this
simple math problem.

Zero plus one equals what?

It only takes a moment to
come up with the answer one,

but imagine that
you needed to do

100 calculations that
were this simple.

You could do it, and if you are

careful you might not
make any mistakes.

What if you needed to do
1,000 of these calculations?

How about a million?

How about a billion? This is

exactly what a computer does.

A computer simply
compares ones and zeros,

but millions or billions
of times per second.

[inaudible]. The communication
that a computer uses is

referred to as binary system,

also known as base-2
numeral system.

This means that it only
talks in ones and zeros.

You may be thinking,

my computer only talks
in ones and zeros.

How do I communicate with
it? Think of it like this.

We use the letters
of the alphabet to

form words and we give
those words meaning.

We use them to create sentences,

paragraphs and whole stories.

The same thing
applies to binary,

except instead of A, B, C,

and so on, we only have zero

and one to create words
that we give meaning to.

In computing terms, we group

binary into eight
numbers or bits.

Technically, a bit
is a binary digit.

Historically, we use

eight bits because in the
early days of computing,

hardware utilized the
base-2 numeral system

to move bits around.

Two to the eighth
numbers offered us

a large enough range of

values to do the
computing we needed.

Back then, any number
of bits was used,

but eventually the
grouping of eight bits

became the industry
standard that we use today.

You should know that
a group of eight bits

is referred to as a byte.

A byte of zeros and ones
could look like 10011011.

Each byte can store
one character,

and we can have 256
possible values

thanks that a base-2
system, two to the eighth.

In computer talk, this byte

can mean something
like the letter

c. This is how a computer
language is born.

Let's make a quick table
to translate something

a computer might see

into something we'd
be able to recognize.

What does the following
translate to?

Did you get hello? Pretty cool.

By using binary, we can have

unlimited communication
with our computer.

Everything you see on
your computer right now,

whether it's a video,

an image, texts
or anything else,

is nothing more than
a one or a zero.

It is important that you
understand how binary works.

It is the basis for everything

else we'll do in this course.

Make sure you understand the
concept before moving on.