79 lines
1.8 KiB
Markdown
79 lines
1.8 KiB
Markdown
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# Button A and button B
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### ~avatar avatar
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Buttons are great to build games!
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### ~
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This program will show the word **ANTEATER** on the LED
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screen when you press button `A`.
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```blocks
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input.onButtonPressed(Button.A, () => {
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basic.showString("ANTEATER");
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});
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```
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#### ~hint
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The ``showString`` block can show letters, numbers, and punctuation
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on the micro:bit screen.
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#### ~
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Now try to unscramble these blocks in the editor so that the micro:bit
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shows **BANANA** when you press button `B`.
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```shuffle
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input.onButtonPressed(Button.B, () => {
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basic.showString("BANANA");
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});
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```
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#### ~hint
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You can find the letter `B` by clicking the letter `A` on the
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``onButtonPressed`` block.
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#### ~
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Click **Compile** to move your program to the BBC micro:bit!
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#### Your turn!
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Can you combine these blocks so your program shows your real name
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instead of **ANTEATER** when you press `A`, but _your secret agent
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name_ instead of **BANANA** when you press `B`?
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### Pins
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You can also use the pins as buttons. (The pins are the holes in the
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metal stripe at the bottom of the micro:bit board.) For example, hold
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the ``GND`` button with one hand and touch the ``0`` pin (called
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``P0``) with your other hand to tell the micro:bit you're pressing it.
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Unscramble the blocks in the editor to show a heart when you touch
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pin ``P0``.
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```shuffle
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input.onPinPressed(TouchPin.P0, () => {
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basic.showLeds(`
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. # . # .
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# . # . #
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# . . . #
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. # . # .
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. . # . .`);
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});
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```
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Click **Compile** to move your program to the BBC micro:bit!
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## ~hint
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Try this experiment: find a friend and hold hands. Touch the ``GND``
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pin while your friend presses the ``P0`` pin. You should see the
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heart! The electric current is going through your bodies and across
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your handshake to make it happen!
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## ~
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## [NEXT: SHAKE](/getting-started/shake)
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