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We can use JavaScript functions to create blocks of code that perform particular tasks when called upon.

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Let's take a look at an example to illustrate how functions work here in our script tags.

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We've defined a function called my function

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this function has two parameters A and B.

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You can call your function anything you like.

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The name can contain letters digits underscores in dollar signs the code to be executed inside the function

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is placed within a set of curly brackets.

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In this case the function is meant to output the value of a multiplied by B.

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To do this we use a return statement.

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It's important to note that a function will stop executing once it reaches the return statement.

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The values of A and B are contained in our inner HCM l function.

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In this case 8 into these values are known as arguments they define the values of the parameters inside

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the function.

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In this case A and B and you can see that we referred back to the function name as well before inserting

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our arguments in the brackets.

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We can see in our web browser that the arithmetic was performed is eight times two is sixteen.

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One of the key benefits of functions is they can be used as many times as needed with different arguments

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to produce different results.

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For example to multiply different values in place of aid and to simply update the arguments.

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Now we're multiplying 6 and 5 and you can see that the output is correct 30.