pxt-calliope/docs/lessons/speed-button/quiz-answers.md

speed button quiz answers

counter that keeps track of how many times button "A" has been pressed #LED #screen #variables #docs #input

This is the answer key for the speed button quiz.

1. What is a variable?

A variable that is available throughout your main function.

2. If the rectangle below represents the BBC micro:bit, shade the area that shows the value of the variable count.

let count = 0

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.

let count_ = 0
input.onButtonPressed(Button.A, () => {
    count_ = count_ + 1
    basic.showNumber(count_, 100)
})

After two button presses, count will be equal to 2.

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.

let count_ = 0
input.onButtonPressed(Button.A, () => {
    count_ = count_ + 1
    basic.showNumber(count_, 100)
})

After five button presses, count will be equal to 5.