2.1.28, initiation update to PXT v5.28.24 (#54)

docs/reference/input/button-is-pressed.md

@@ -6,17 +6,17 @@ Check whether a button is pressed right now. The @boardname@ has two buttons: bu
 input.buttonIsPressed(Button.A);
 ```
 
-### Parameters
+## Parameters
 
-* ``button`` 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.
+* ``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.
 
-### Returns
+## Returns
 
-* [Boolean](/blocks/logic/boolean) that is `true` if the button you are checking is pressed, `false` if it is not pressed.
+* a [boolean](/blocks/logic/boolean) value that is `true` if the button you are checking is pressed, `false` if it is not pressed.
 
-### Example
+## Example
 
-This program uses an [if](/blocks/logic/if) to run 
+This program uses an [``||logic:if||``](/blocks/logic/if) to run 
 one part of the program if the `A` button is pressed, and 
 another part if it is not pressed.
 
@@ -25,15 +25,19 @@ basic.forever(() => {
     let pressed = input.buttonIsPressed(Button.A)
     if (pressed) {
         // this part runs if the A button is pressed
-        basic.showNumber(1, 150)
+        basic.showNumber(1)
     } else {
         // this part runs if the A button is *not* pressed
-        basic.showNumber(0, 150)
+        basic.showNumber(0)
     }
 })
 ```
 
-### See also
+Find out how buttons provide input to the @boardname@ in this video:
+
+https://www.youtube.com/watch?v=t_Qujjd_38o
+
+## See also
 
 [on button pressed](/reference/input/on-button-pressed), [if](/blocks/logic/if), [forever](/reference/basic/forever)