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Now that we have a method for
collecting and storing information.

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Let's see how to use variables to display
different messages in an alert box.

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I'll use variable together
with the prompt and

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alert to create a simple program
that ask the user for their name and

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replies with a short message
that displays their name.

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So in a console, I create a new
variable named response to store and

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remember the response, or what a user
types into the prompt dialogue box.

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So I'll set the value to prompt,
passing it the variable question.

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Now I'll press Shift+Enter
to bring the cursor down.

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And below the response variable,
I'll add alert and

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pass it the message to
display as a string.

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So the message will be Hello, followed by
the users name and an exclamation mark.

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So the response variable is going to
hold the value of what the user types

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into the box as a string, so
to combine the word hello and

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the exclamation mark with what
the user types into the dialogue box.

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I'll first type Hello and
a space between quotes,

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followed by a plus sign,
and the response variable.

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Then to add the exclamation
mark at the end,

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I'll type a plus sign followed by
the exclamation mark inside quotes.

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So here, I'm combining strings

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using the plus sign which is a common way
of joining two or more strings together.

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Combining strings together like
this is called concatenation.

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It's JavaScript's way of adding strings
together to create a bigger string.

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So now I'll press Enter
to run this program and

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in the browser, I first see the prompt
dialog box asking, what is your name.

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I'll type Guil and click OK.

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Then I get the alert box with the message,
Hello Guil!, good.