pxt-calliope/docs/reference/input/button-is-pressed.md
2016-03-25 16:47:20 -07:00

42 lines
1.0 KiB
Markdown

# Button Is Pressed
Get the state of an input button. The micro:bit has two input buttons: A and B.
```sig
input.buttonIsPressed(Button.A);
```
### Parameters
* name - [String](/microbit/reference/types/string); input button "A", "B", or "A+B" (both input buttons)
### Returns
* [Boolean](/microbit/reference/types/boolean) - `true` if pressed, `false` if not pressed
### Example
The following code uses an [if](/microbit/reference/logic/if) statement to run code, depending on whether or not the A button is pressed:
```blocks
basic.forever(() => {
let pressed = input.buttonIsPressed(Button.A)
if (pressed) {
// this code runs if the A button is pressed
basic.showNumber(1, 150)
} else {
// this code runs if the A button is *not* pressed
basic.showNumber(0, 150)
}
})
```
### Lessons
[zoomer](/microbit/lessons/zoomer)
### See also
[on button pressed](/microbit/input/on-button-pressed), [if](/microbit/reference/logic/if), [forever](/microbit/basic/forever)