# Demo

In this demo, you can see how HyperFormula handles basic operations by using API methods, such as:

* `buildEmpty` static method to initialize the instance
* `addSheet` method to add a new sheet
* `setCellContents` method to add content
* `getSheetId` method to retrieve the sheet's ID
* `getCellValue` method to get the value of a cell
* `calculateFormula` method to calculate a formula
* `getCellFormula` method to retrieve a formula from a cell