51 lines
1.3 KiB
Markdown
51 lines
1.3 KiB
Markdown
# speed button quiz answers
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counter that keeps track of how many times button "A" has been pressed #LED #screen #variables #docs #input
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This is the answer key for the [speed button quiz](/microbit/lessons/speed-button/quiz).
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## 1. What is a variable?
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<br/>
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A variable that is available throughout your main function.
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## 2. If the rectangle below represents the BBC micro:bit, shade the area that shows the value of the variable count.
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```blocks
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let count = 0
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```
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## 3. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after two button presses on Button A. Explain why that particular area is shaded.
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```blocks
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let count_ = 0
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input.onButtonPressed(Button.A, () => {
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count_ = count_ + 1
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basic.showNumber(count_, 100)
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})
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```
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<br/>
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After two button presses, **count** will be equal to 2.
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## 5. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after five button presses on Button A. Explain why that particular area is shaded.
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```blocks
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let count_ = 0
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input.onButtonPressed(Button.A, () => {
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count_ = count_ + 1
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basic.showNumber(count_, 100)
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})
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```
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After five button presses, **count** will be equal to 5.
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