pxt-calliope/docs/lessons/offset-image/quiz-answers.md

offset image quiz answers

shift an image horizontally across the display with offset #offset #screen #variables #docs

This is the answer key for the offset image quiz.

1. What is a 'if, then, else statement' ?

An if-then statement will run a block of code if the condition specified is true. The statement will run the "else" block of code if that condition is false.

2. Consider the message

Write the line of code that that will create the message "Push button A" (Hint: This message appears if the offset is equal -4 then the BBC micro:bit will state "Push Button A").

if (offset == -4) {
    basic.showString("Push Button A", 150)
}

3. Consider the following image

When with this image be displayed?

When the offset is NOT equal to -4 then the BBC micro:bit will show the image above.

4. Consider the following image

Write the two lines of code that cause the variable offset to increase by one when button A is pressed.

input.onButtonPressed(Button.A, () => {
    offset = offset + 1
})