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If you've ever thought about building
websites or

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mobile apps as a career, you might be
wondering how all of the many tools,

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languages, and jobs in the tech industry
fit together.

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Let's start with the three most common
types of projects.

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Mobile apps, websites, and web apps.

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You probably already know what mobile apps
are.

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They are the apps you use on your
SmartPhone or

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other device, like SnapChat or Instagram.

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To build a mobile app, you first have to
choose whether you'll start with

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an app for the iPhone or iPad, or Android
phones or tablets.

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Building an iPhone app requires a Mac
computer, and a free program called Xcode.

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You'll use Xcode to write your app in a
programming language called Swift.

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Once you've finished your app, you can
sell it for real money in the App Store.

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You'll upload your app to the App Store,
and

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once it's been approved by Apple, you're
ready to start selling it.

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Creating an app for Android devices is a
similar process using a Mac or Windows PC.

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Android apps are built in a free program
called Android Studio

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using a language called Java.

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Let's move on to building websites.

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Websites are built in text editors, using
a combination of languages,

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such as HTML, CSS, and JavaScript.

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These are some of the easiest languages to
learn.

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And getting your first basic website
online is something anyone can do.

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If you wanna add interactivity to your
website, like the ability for users to

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login and create accounts, then what you
really want to build is a web app.

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Facebook, Twitter, and Google Maps are all
examples of popular web apps.

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Web apps are created with text editors
much like normal websites are,

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except web apps are built using more
powerful programming languages,

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such as Ruby, PHP, or Python.

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You'll also need a database, which stores
all of the information that

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powers your site, like user account
details or pictures.

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Now, let's talk about the most common
types of jobs in the tech industry.

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Mobile apps, websites, and

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web apps are built by designers, front-end
developers, and back-end developers.

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Designers are focused on the way things
look and behave.

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They create the visual design of apps and

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websites using tools like Photoshop and
Illustrator.

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If you've ever noticed how nice a website
looks, or

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how easy to use a mobile app is, you can
thank the designer.

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Once a design has been created, a
front-end developer takes the design, and

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turns it into code a browser can
understand, using HTML, CSS,

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and Javascript.

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Often, a designer and a front-end
developer are actually the same person,

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both creating the design and turning it
into functional front-end code.

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And finally, we have the back-end
developer.

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They're the ones who add web app
functionality to a website,

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connecting it to a database, and

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writing the code that makes it possible to
log in and create accounts.

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All of this is done using some of the more
powerful languages we mentioned earlier,

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Ruby, Python, PHP, and Java, just to name
a few.

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Designers, front-end developers, and

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back-end developers are the backbone of
the tech industry.

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Treehouse teaches all the skills you need
to start a new

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career in the exciting world of
technology.