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

Posted by luckius kajoka
luckius kajoka
1,695 Points

how can i log out with 4 line contain both proprty and value eg population:value

help me please

script.js 
var shanghai = {
  population: 14.35e6,
  longitude: '31.2000 N',
  latitude: '121.5000 E',
  country: 'CHN'
};
 for (var state in shanghai) {
console.log(state,':',shanghai["population"]);
}
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

Ross King
Ross King
20,704 Points

luckius kajoka You were pretty close!

Problmen

Instead of:

   console.log(state,':',shanghai["population"]);

Solution

You need:

   console.log(shanghai.state);

Reason

The for in loop iterates through each key in the object. So you have defined the word state as your key and shanghai as the object.

Every iteration of the loop will below will log the state key.

for (var state in shanghai) {
   console.log(state);
}

// population
// longitude
// latitude
// country

When combine the key and the object you will get the object properties

for (var state in shanghai) {
   console.log(shanghai.state);
}

// 14.35e6
// '31.2000 N'
// '121.5000 E'
// 'CHN'
luckius kajoka
luckius kajoka
1,695 Points

thanks verry much you have opened my mind.