Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
function computeArea(width, height) {
  return width * height;
}

computeArea(2, 2);

/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/


// tests

function testComputeArea() {
  var width = 3;
  var height = 4;
  var expected = 12;
  if (computeArea(width, height) === expected) {
    console.log('SUCCESS: `computeArea` is working');
  }
  else {
    console.log('FAILURE: `computeArea` is not working');
  }
}

testComputeArea();
</script>


<script id="jsbin-source-javascript" type="text/javascript">function computeArea(width, height) {
  return width * height;
}

computeArea(2, 2);

/* From here down, you are not expected to
   understand.... for now :)


   Nothing to see here!

*/


// tests

function testComputeArea() {
  var width = 3;
  var height = 4;
  var expected = 12;
  if (computeArea(width, height) === expected) {
    console.log('SUCCESS: `computeArea` is working');
  }
  else {
    console.log('FAILURE: `computeArea` is not working');
  }
}

testComputeArea();</script></body>
</html>