# Interest calculating spreadsheet

In this JavaScript example, you can find out just how much that new
house or car is going to cost you each month. Enter values in the fields below
to find out how much your payments would be with the given
number of payments, interest rate, and amount of the loan.

You can use your **Document Source** function in
the **View** menu to look at the source of this HTML document. In the source, you'll
see various math and formatting functions using the JavaScript language.