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And welcome to this video.

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In this video I will be introducing you to Java's group variables.

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What are their Borse in Javascript javascript variables are containers for storing data values in order

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to create a variable in need to use the VAR key word which is spelled fee.

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Ah.

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He has to be in lower case.

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Also when you quit variables creating a variable means declaring variables is the same P When you declare

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variables you have to assign value to variables.

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You use the equal sign to assign values to a variable.

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For example if I wanted to create a variable x I'm going to give it a value of 7.

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Also if I want to create a variable called See My car I give it a value of poche When you are creating

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variables is always a good practice to name your variables clues lead to what they are going to store.

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The type of data they're going to store.

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Poor example here.

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And then there's variable.

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My car which is an indication that the type of data storing is related to cars.

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No it is a difference in the two values here.

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This one here the value 7 which is a number and it is here.

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The value here is support.

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And I've put quote around it where you are declaimed variables.

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If you are declaring a text you have to enclose it in quotes.

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You either have to use single quotes or double quotes.

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You can't mix them you can't use a single quote here and then a double quote here.

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That's the only way the computer will understand that it is dealing with a text.

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You need to enclose the values in quotes.

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You don't need to do that with numbers but a computer knows that is a number.

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But if you want the computer to know that is a string they call it this string in programming.

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If you want to know that this is a string in it or lose it.

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It's also not is of use semicolons here which is important.

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That indicates that that is the end of that statement a javascript program is basically a collection

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of state.

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In the case this is one statement.

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This indicate this is another step in because of the semicolon.

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So you have to do that.

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Are you declaring variables.

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You can also declare variables without a sign them value.

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So when you declare a variable without a value it is known as on defined.

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Once you have defined or declared a variable you can change its value.

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For example here have already defined the variable called my car.

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If I wanted to change the value from poche for example to a range rover all I need to do is call the

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variable by name and assign it different value so that we already change the value once you declare

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a variable.

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You can change the value a variable that is declared without a value is known as on define it also is

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very important to know that javascript is case sensitive.

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So for example here declare this variable.

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My car car with a key.

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See if I tried to reference it with a lower case c..

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It will not work.

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You can experiment with javascript inside your web browser.

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If you are using a Mac you can access to a web browser console by clicking on option command and G.

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Why do you call the web browser open.

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If you are on a Windows computer and once you've got the Web browser open you can just press F 12 that

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will give you the web console.

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I have got the Google home page open so I'm going to access the web console just by hitting the 12 on

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the keyboard and that would give me the console.

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This is the developer console where you can experiment with a script.

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So there are different ways you can dock it.

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If you click here at the moment the doctor decide you can also dock it to the button and that will give

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you the page to web page you currently view and then you can text.

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With the cord on the side.

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All he can do it on this side dock it to the left.

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So depending on where you fancy you can lock it wherever you like.

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I am going to just dock it on the net for now so let's try an experiment wait some Jabr scrip So I'm

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going to declare a variable inside the console here.

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Just type in the art to declare a variable.

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I'll give the variable in them off thanks.

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Give it the value of 7.

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So now if I want to call this variable all I need to do is call the variable by his name.

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If I press X it will return the value of 7.

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Now that I have declared the variable I can also change its value.

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All I need to do is call it by its name.

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Use a post to assign different value.

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Now if I quote variable x again in the longer still 7 but in our stores the same thing I declare another

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variable called Let's declare a new variable and when a call is variable.

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My car.

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K.

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My car.

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OK in I'll give it my car and I'm going to give it a value off.

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See porsh.

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Okay.

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And amid the semicolon to end that.

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So now if I call these variable by its name if I see for example if I call call it by car.

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It will not work.

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You know why.

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Because I represented in lower case you know this I use this in upper case.

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So it is very important that you referenced variables the way you've defined them.

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Find the hard core back and call it again.

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With Casey it should return right because he's giving me a value of poche and once you declare the variable

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you can easily change its name change its value.

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So if I want to change that to something else I'll just call it my name.

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So I want to change it to a Ford for example.

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It can do a semicolon.

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Now that's changed.

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If I call the variable again by name it will no longer store render a vote for now storing fraud.

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So these are some of the basic examples you can use to play around in the browser consider the conses

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very useful for playing around with little little looking values like this so you can experiment and

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get acquainted.

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So that's it for this feed you on Javascript variable.

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Many thanks.

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Bye for now.