What is a sub-object? Provide an example.

What will be an ideal response?

The value of a property can be another object, which is known as asub-object. For instance, the following code creates an object namedorderwith a sub-object namedaddress: var order = {    orderNumber: "F5987",    address: {       street: "1 Main St",       city:"Farmington",
       state: "NY",       zip: "14425"    } };The main object, with the name order, has two properties: orderNumber and address. Theaddressproperty is itself a sub-object, and has four properties of its own:street, city,state, andzip.