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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects Access and Set Object Properties

Ying Liang
Ying Liang
2,403 Points
Posted by Ying Liang
Ying Liang
2,403 Points

Do we need to add "" when set a number value to a property?

In the previous challenge, when I type a number directly as a value to a property. It says it is a syntax error, after I add "" to the value, it says right. But this time, I don't need a "". Why?

script.js 
var newYork = {
  population: 100, 
  latitude: '40.7127 N',
  longitude: '74.0059 W'
};

newYork.population=8.406e6;
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

Colin Marshall
Colin Marshall
32,861 Points
Colin Marshall
Colin Marshall
32,861 Points

The challenge that would not let you pass without the quotation marks wanted the number to be stored as a string. Numbers (without quotes) are perfectly fine to have as a value for a key, but that specific challenge was asking for the number as a string. If you point me to the specific challenge you couldn't pass without the quotes, I can go into further detail for you.