If I defined an object in JS with: var j={"name":"binchen"}; How can I convert the object to JSON? The output string should be: '{"name":"binchen"}'

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To convert a JavaScript object to a JSON string, you can use the JSON.stringify() function. In your case, you've defined the object as var j = {"name": "binchen"}. Here's how you can convert it to the desired JSON string:

javascript
var j = {"name": "binchen"};

var jsonString = JSON.stringify(j);

console.log(jsonString); // Output: '{"name":"binchen"}'

In this example, the JSON.stringify() function takes the object j and converts it into a JSON-formatted string. The resulting jsonString will be '{"name":"binchen"}', as you specified.

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