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JavaScript Functions

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Default Function Parameters

5:11 with Guil Hernandez

JavaScript lets you assign default values to your function parameters. That way, if, for any reason, you do not pass a specific argument to a function, the function uses (or falls back to) the default value.

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Code Snippets

function getArea(width, length, unit) {
  const area = width * length;
  return `${area} ${unit}`;
}

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    the function uses or falls back to the default value. 0:00
    Open the file default-params.js, 0:03
    then update the script tag in index.html to point to default-params.js. 0:07
    Let's first take a look at what happens when you don't pass an argument 0:15
    to a function that requires one. 0:18
    I'll define a function named sayGreeting that takes the parameter name. 0:21
    I'm writing this as a function declaration, 0:27

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