c_meyer/pxt-calliope
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Making another topic easier to understand.

Browse Source
This commit is contained in:
Ron Hale-Evans 2016-05-20 16:05:45 -07:00
parent 86b35ae88d
commit a67164d5e6
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
docs/reference/input/button-is-pressed.md
View File

@ -1,6 +1,6 @@
# Button Is Pressed
Get the state of an input button. The micro:bit has two input buttons: A and B.
Check whether a button is pressed right now. The micro:bit has two buttons: button `A` and button `B`.
```sig
input.buttonIsPressed(Button.A);
@ -8,24 +8,26 @@ input.buttonIsPressed(Button.A);
### Parameters
* name - [String](/reference/types/string); input button "A", "B", or "A+B" (both input buttons)
* ``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) - `true` if pressed, `false` if not pressed
* [Boolean](/reference/types/boolean) that is `true` if the button you are checking is pressed, `false` if it is not pressed.
### Example
The following code uses an [if](/reference/logic/if) statement to run code, depending on whether or not the A button is pressed:
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 code runs if the A button is pressed
// this part runs if the A button is pressed
basic.showNumber(1, 150)
} else {
// this code runs if the A button is *not* pressed
// this part runs if the A button is *not* pressed
basic.showNumber(0, 150)
}
})