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In this course, we're going to use Ruby
to create a shopping program for widgets.

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What's a widget?

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I don't really know.

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But they sure are popular.

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People often buy them in groups of 50,
100,

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or more even though they cost $10 a piece.

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The widget store needs us to write
a program that lets a user type in

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the number of widgets they want to buy,

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multiply that by ten to get the total
price and report the total to the user.

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They're also thinking that they may need
to offer discounts if a user is purchasing

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a large quantity.

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Sound complicated?

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Don't worry, everything we need to
solve this problem is built in to Ruby.

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We'll learn how to output
text to the terminal and

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store values the user types in.

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We'll learn how to do arithmetic in Ruby.

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And we'll learn to write Ruby methods that
let us break the problem into small chunks

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that we can easily handle.

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Before we get started,
we want to make sure you know about all

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the Treehouse features that will
help you succeed with this course.

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We've tried to adjust the pace of this
material to accommodate everyone.

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But depending on what you know,
it's probably going to be too slow for

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you in some places and too fast in others.

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So take a moment to familiarize yourself
with the video playback controls.

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You can adjust the playback
speed to be faster or slower.

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You can rewind if you need
to go over something again.

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And you can pause if there's text on
screen that you need time to look

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at more closely.

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On the page for any video in this course,
you can click the launch

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works space button to start an environment
where you can code along with the video.

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And run your program when you're done.

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Every video page will also have
teacher's notes with code samples,

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links to additional reading,
troubleshooting tips, or

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additional ways you can
practice what you've learned.

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In between some videos, we'll have quizzes
and code challenges where you can review

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what you've learned and practice it so
the knowledge really sticks.

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Okay, are you ready?

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In the next video,
werel going to get started on our app.