
Henry Powell
3,414 PointsTrouble with for in loop
Bummer: There was an error with your code: ReferenceError: Strict mode forbids implicit creation of global property 'prop'
script.js
var shanghai = { population: 14.35e6, longitude: '31.2000 N', latitude: '121.5000 E', country: 'CHN' }; for (prop in shanghai) { console.log(prop); }
var shanghai = {
population: 14.35e6,
longitude: '31.2000 N',
latitude: '121.5000 E',
country: 'CHN'
};
for (prop in shanghai) {
console.log(prop);
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript Objects</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>
2 Answers

Greg Heffley
6,371 PointsYou need to assign prop as a variable.
for (const prop in shanghai) {
console.log(prop);
}

Henry Powell
3,414 PointsThanks Greg!