Today, you use an if, then block
to tell the computer what sound to play
each time your projectile sprite
change costumes.
If, then statements are an important concept
that computer scientists use all the time.
Computers can not think or make decisions on their own.
They make decisions based on the code that was written.
If, then statements are one way to tell
the computer to make a decision.
If, then blocks, like this
are also called conditionals.
Because they run in code when a certain condition is met,
and they do not run the code
if that same condition is not met.
This concept is used in all types of computer science
that you will encounter in the future.
In high school or college computer science classes,
in multiple computer science languages,
and in the keyboarding and spreadsheet class
that you'll take in high school,
you will be a step ahead
because you will have successfully
used conditionals or if, then blocks.
Next time is your last session of CS First.
But that doesn't mean that your experience
with computer science has to end.
Remember, you can access Scratch
from any computer with an internet connection
and you can always return to this CS First website
to watch more screen casts,
build more add-ons to your projects
or even do another club theme like games
on your own.
Computer science is all about creating.
Access to Scratch.
The knowledge that you learn here
and the courage to just keep trying
will enable you to build anything you want.
In the next CS First club,
you will build a thank you project.
(relaxing music)
