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All right.
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So in this module we're going to cover strings in more detail and we're going to fully get to grips
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with this particular primitive data type.
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So previously we saw that we can combine strings using the plus sign.
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And this creates a single string using a special feature of programming called concatenation.
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Now you have to imagine that you're joining together everything that's inside a quotation mark and ignoring
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everything else.
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So "a" + " " + "b" becomes "a b" concatenated into a single string.
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Now let's try it out in practice. If we head over to Chrome and we open up our Developer Tools and we
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head over to our Sources and our Snippets,
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then we can start writing some code inside our index.js. So we can create an alert that says "hello"
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+ "world".
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And this, when we run it, will show helloworld with no spaces in between. So we can add the space by either
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including it inside a string, so a string with a single space,
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and this would be "hello" " " "world",
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or we can have it where we have a "hello" + " world", and remember that it's only the parts that are
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inside the quotation marks that are combined.
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All right. So this is pretty easy.
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So I want to set you the challenge of creating a greeting message using variables and alerts.
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So I want you to start off with two variables.
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One is a message which is equal to Hello, and the other variable is called name,
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and you can set it to either your name, or you can set it to whatever the user enters in a prompt.
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Then I want you to write a single line of code where you can create a pop up or an alert that says something
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like, that combines or concatenates these two variables into a single string using these two variables
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rather than simply just typing the string out.
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So pause the video and complete this quick challenge.
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All right.
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So that's pretty easy.
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All we need to do is to create an alert.
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We add the message.
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Then we add some characters in between, so namely it'll be
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Hello there,
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and then we add the name that we are going to greet.
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And finally we close off our alert.
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Now the important thing here is that you remember to add the spaces between the message and the name
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variables.
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You could have done it this way or you could add another string that's simply a space as well.
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So did you get that right?
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If not, have a review of this lesson and have a play around with concatenation inside the Chrome Developer
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Tools. And in the next lesson we're going to cover another cool feature of strings which is how we can
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quickly find out the number of characters that are contained inside a single string.
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So for all of that, I'll see you on the next lesson.