pxt-calliope/docs/reference/input/button-is-pressed.md
2016-06-11 22:28:57 -04:00

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# Button Is Pressed
Check whether a button is pressed right now. The micro:bit has two buttons: button `A` and button `B`.
```sig
input.buttonIsPressed(Button.A);
```
### Parameters
* ``name`` is a [String](/reference/types/string). You should store `A` in it to check the left button, `B` to check the right button, or `A+B` to check both at the same time.
### Returns
* [Boolean](/reference/types/boolean) that is `true` if the button you are checking is pressed, `false` if it is not pressed.
### Example
This program uses an [if](/reference/logic/if) to run
one part of the program if the `A` button is pressed, and
another part if it is not pressed.
```blocks
basic.forever(() => {
let pressed = input.buttonIsPressed(Button.A)
if (pressed) {
// this part runs if the A button is pressed
basic.showNumber(1, 150)
} else {
// this part runs if the A button is *not* pressed
basic.showNumber(0, 150)
}
})
```
### See also
[on button pressed](/reference/input/on-button-pressed), [if](/reference/logic/if), [forever](/reference/basic/forever)