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Hello and welcome to this video on our of functions our functions sometimes called fat Harrow functions

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have an abbreviated syntax for working with the function they are represented by BE equal sign and big

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great symbol.

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Don't confuse this with comparison operators because it does something quite different.

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So I'm going to illustrate with an example.

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So you can see how our all functions work side by side.

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My text editor here I have created a variable here called student lists.

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We've said that two equals two functions.

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We pass in it's too dense as I remember and there were console logging in the students that were passed.

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Here again I'm calling the function an impasse in it an array here we two values John and Jane.

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So this is a typical function expression.

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I'm going to re model this or refactor this code using an arrow function so you can see how the arrow

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function actually works.

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So that piece of code here if you run it inside the console of your web browser it will display something

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like this.

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So make sure you have the console selected and click on that to see the two values of the harrie's here

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which is this to here John and Jane.

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So now let's refactored this court with an hour of fanshen.

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Right let's.

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We -- up this course.

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First thing I want to do is remove this function key word and unleash that again let's remove that to

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trying to shorten because I remove this curly braces.

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That's the only one I get rid of that as well.

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I just bring that could be nearer.

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I'm also going to bring this console log here.

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I'm going to make print it on the same lie just to shorten the code and we need to add our function

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here so and do that and then the greater than sign so that our function in there so you can see just

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by using a function we have reduced the amount of code to be written we've actually shortened the code.

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So I expect to get the same output.

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I'm just going to see my code and our lunch my browser again and to see if I get the same I should get

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the same output.

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You can see here I'm getting the same outputs as you are using in browser Babbo transformer.

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Some got John and J.

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So that's basically how you use our function.

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The main purpose of an IRA function is to shorten the expression use.

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Okay so by using that got real optical embraces and should tint my code.

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I can solve for shorting this code because I'm only passing one argument which is the students I can

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remove the parenthesised that shoots to work.

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However if you are passing in more than one argument you do need to include them in parenthesis.

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So I'm going to say that wrong the code again.

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He should I should get the same output.

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I do a refresh.

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It can see the output is to the same.

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Alright so that's basically how our functions work.

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Functions are a great way to make your javascript code more readable and more compact.