44 lines
1.2 KiB
Markdown
44 lines
1.2 KiB
Markdown
# Button Is Pressed
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Check whether a button is pressed right now. The @boardname@ has two buttons: button `A` and button `B`.
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```sig
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input.buttonIsPressed(Button.A);
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```
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## Parameters
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* ``button`` is a [String](/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.
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## Returns
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* a [boolean](/blocks/logic/boolean) value that is `true` if the button you are checking is pressed, `false` if it is not pressed.
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## Example
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This program uses an [``||logic:if||``](/blocks/logic/if) to run
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one part of the program if the `A` button is pressed, and
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another part if it is not pressed.
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```blocks
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basic.forever(() => {
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let pressed = input.buttonIsPressed(Button.A)
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if (pressed) {
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// this part runs if the A button is pressed
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basic.showNumber(1)
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} else {
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// this part runs if the A button is *not* pressed
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basic.showNumber(0)
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}
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})
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```
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Find out how buttons provide input to the @boardname@ in this video:
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https://www.youtube.com/watch?v=t_Qujjd_38o
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## See also
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[on button pressed](/reference/input/on-button-pressed), [if](/blocks/logic/if), [forever](/reference/basic/forever)
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