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So this section it kinda give
you an introduction to binary.

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What it actually is?

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So binary is actually
a base 2 number system,

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it also known as the binary number system.

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So it's actually helpful
to fewest computer program.

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I don't wanna understand the basics of
binary when you're actually writing some

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programs and an example of that
would be when you're writing or

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when you're reading and writing.

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Binary data into a file, but

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we'll actually keep these
section fairly short and simple.

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If you're already understand binary and
hexidecimal and

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if you're comfortable with that.

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You might wanna actually skip this section
and move straight on to section 9.

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Now, the other thing is if you actually
struggle to understand this section,

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don't necessarily let it put
you off the rest of the course.

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The thing to remember is that
although many high-level languages

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allow binary manipulation and
other binary operations in your coding,

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they're not actually necessary for
the vast majority of programming tasks.

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So if you're happy to take at face value
and believe us when we say that for

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example, the number 256
requires two bytes,

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then you can actually continue
with the rest of the course,

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moving on to the next section without
really having to understand this section.

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With that said, though,
we both really suggest you give it a go.

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And just works through in perhaps
even watched the video a few time

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because having that knowledge of binary,
really sorts of help you understand

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what's sort of happening under
the hood at the hardware level and

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speaking of hardware it's actually.

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Possible to create computer circuitry
that actually works in decimal.

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In other words having ten different
voltage range to represent the ten digits

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of decimal for example.

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But it's much simpler and hence cheaper
To just deal in terms of on and off.

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So that's low voltage or high voltage.

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And for that reason,
computers nowadays always work in binary.

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And I'm gonna swap over, now,
to a page in my browser.

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And just showing you the link up
there in the top left hand corner.

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I've sized him up so
you can see it a little bit better.

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And this is actually a video.

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It's a little short video.

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I would suggest that you actually
take the It's time to watch it.

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Now it's a computer that worked in
decimal, rather than binary and

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created initially in 1951 and
it has been restored.

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It is now fully operational at
the National Museum of Computing

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which is at Bletchley Park on the UK.

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So I suggest you just take like
a few minutes to watch and

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sort to see a different thing working
like a computer with decimal,

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unlike all the modern day
computers which are in binary.

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So that's it,
I'm gonna finish the video here.

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In the next video we're gonna go ahead and
start having a look

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at how to perform arithmetic using
only the digits zero and one.

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So I'll see you in that next video.