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JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Passing an Argument to a Function

Michael Gardiner
Michael Gardiner
4,282 Points

Confused

Not sure where it wants me to go with this

script.js
function returnValue() {
  var num1 = x;
  return num1;
  var echo = num1;
}
returnValue("Hello");
index.html
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

2 Answers

Hi Michael,

When you declare a JavaScript function, part of the function syntax includes an "argument" or "parameter."

function functionName(parameter){
  statement
}

The code challenge you are working on instructs you to create a function named "returnValue," which you have done, that accepts a single argument and returns that argument. What your code is missing is an argument to pass back. See the following:

function returnValue(x){
  return x;
}

There is more information available about functions on the [Mozilla Developer Network.] (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions#The_function_declaration_(function_statement)

I hope that helps! -Alex

Michael,

What Alexandria said. take time to get very familiar with two concepts: arguments/parameters and return values. You'll use them all the time, and they're the fundamental key to using functions anywhere, in most any language.