You can use its default id (which starts

You can use its default id (which starts with

b

b, etc, or change its ID to a better name by clicking on the the

pencil

pencil

pencil

pencil on the left panel (inside

Components

Components

Components

Components). On a button, you can click on

Create an inline script

Create an inline script

Create an inline script

Create an inline script, choose

JavaScript

JavaScript

JavaScript

JavaScript and you can use the input value using its id dot result, e.g:

txtNumber.result

txtNumber.result

txtNumber.result

txtNumber.result.