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

Brok Sorensen
Brok Sorensen
1,578 Points
Posted by Brok Sorensen
Brok Sorensen
1,578 Points

What value is supposed to be in the var echo =?

After your newly created returnValue function, create a new variable named echo. Set the value of echo to be the results from calling the returnValue function. When you call the returnValue function, make sure to pass in any string you'd like for the parameter.

The function will accept the string you pass to it and return it back (using the return statement). Then your echo variable will be set with what is returned, the results.

script.js 
function returnValue (number){
  var echo = returnValue
return number;
}
returnValue("one");
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

andren
andren
28,558 Points
andren
andren
28,558 Points

The echo variable is meant to be defined outside the function, not inside it. And it should be set equal to calling the function. Like this:

function returnValue(number) {
  return number;
}

var echo = returnValue("one");

That will result in echo being set equal to whatever value the returnValue function returns.

Brok Sorensen
Brok Sorensen
1,578 Points
Brok Sorensen
Brok Sorensen
1,578 Points

That did it! Thank you very much! I was really stumped on that one. Thanks again.

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,253 Points
Jonathan Grieve
Jonathan Grieve
Treehouse Moderator 91,253 Points

The value you want to pass in is echo

You want to use the echo outside of the function you create. I'll walk you through each task individually.

To pass the first part, you want to create the basic elements of a function... which is the keyword, the name of the function, a parameter and then the return keyword.

Which gives you the following.

function returnValue (number){
   return number;
}

The next thing you want to do is define a new variable, below the function called echo.

What you'll do is here is call the returnValue by giving it an argument. The Argument is what the number paramer is waiting for. It's like a placeholder for a value to be passed into it. And it's assigned to the echo variable so it looks like this 

  var echo = returnValue("one");

Good luck with the challenge. Hope this clears things up for you :)