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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects Accessing All of the Properties in an Object

Posted by ihengsiho
ihengsiho
2,494 Points

Bummer! It's a good idea to use the `var` keyword in a `for in` loop like this: `for (var key in shanghai)`.

What am I doing wrong?

script.js 
var shanghai = {
  population: 14.35e6,
  longitude: '31.2000 N',
  latitude: '121.5000 E',
  country: 'CHN'
};

for (property in shanghai) {
  console.log(property, ": ", shanghai[property]); 
}
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Objects</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

1 Answer

Shanil Hewage
Shanil Hewage
2,236 Points
Shanil Hewage
Shanil Hewage
2,236 Points

The problem is that property is not defined as a variable.

for (var property in shanghai) {
  console.log(property, ": ", shanghai[property]); 
}

This should work.

ihengsiho
ihengsiho
2,494 Points

Thank you Shanil. Confusing when in the video, var was not used but you have to use it in the exercise.