WEBVTT

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Let's animate Winston
using the shortcuts that you just learned.

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So, here we've got Winston with his eyes

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and we've got this <i>eyeSize</i> variable.

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So if we wanted to make
Winston's eyes get bigger

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we could just say "eyeSize += 1,"

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adding one pixel to the size of the eyes

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each time, and <i>whoah</i>! 
Look at it, it's buggin' out!

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Let's restart -- <i>whoah</i>! Bug out! Bug Out!

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Now, that's pretty cool.

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And, it turns out in programming

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we actually add one to variables a lot.

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Maybe while animating but also,

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you'll see there's a lot of other reasons

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why we add one to variables later.

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Programmers got bored 
of writing "+= 1" all the time

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because programmers
get bored of silly things.

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So they came up with
a shorter way of writing it.

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So instead of "eyeSize += 1," 
we could just write "eyeSize++"

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You see, it will do 
exactly the same thing.

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It's just a shorter way of doing it.

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And not only do we use 
this in programming,

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Now most programmers 
use it in everyday speech.

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Because pretty much 
we're all familiar with <i>++</i>.

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And it's an easy way of saying

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that you're making 
something a little bigger.

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So if we went to Winston's birthday party,

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we might say, "Oh, happy birthday
Winston, Winston++!"

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Because Winston just got a year older.

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Or if we just learned a new fact you might be like,

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"Oh, go us, intelligence++!"

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That's pretty fun.

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So when should you use ++ versus +=?

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Well, I think for animation 
it's cool to use +=, because then

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you can use the number scrubber
and you can be like,

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"Whoah! Let's make it -- whoah whoah!
That was awesome!

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Let's make it really crazy,
really different!

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Oh! (laughter) See how fun that is?

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But, you know, depending 
on what you're doing

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it might be convenient just to say "++."

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And you'll see later
that there's lots of times

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when you might want to add one

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to variables, not just for animation,

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where the <i>++</i> operator 
could become even more useful.

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So just keep that in mind
when you see that ++

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and try using it in your everyday speech.