Button () is ()?
<button (0 v) is [pressed v]? :: extension>
Category Raspberry Pi Simple Electronics
Type Boolean
Introduced in 3.0

The button () is ()? block is a Raspberry Pi Simple Electronics block and a boolean block. Its options are the numbers 0 thru 27 for the first input, with each number representing a GPIO pin. The second options are "pressed" and "released". The block returns whether or not specified LED is pressed or released, depending on the input.