66 lines
1.3 KiB
Markdown
66 lines
1.3 KiB
Markdown
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# digi yoyo challenges
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Coding challenges for the digi yoyo.
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## Before we get started
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Complete the following guided tutorial:
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* [tutorial](/microbit/lessons/digi-yoyo/tutorial)
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At the end of the tutorial, click `keep editing`. Your code should look like this:
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```
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let count = 0
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while (count < 10) {
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basic.pause(1000)
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basic.showNumber(count, 150)
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count = count + 1
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}
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```
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### Challenge 1
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How about we create a counter that counts backwards from 10 to 1? Let's add a while loop that executes only when `count` is greater than 0.
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```
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let count1 = 0
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while (count1 < 10) {
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basic.pause(1000)
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basic.showNumber(count1, 150)
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count1 = count1 + 1
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}
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while (count1 > 0) {
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}
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```
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### Challenge 2
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### @video td/videos/digi-yoyo-1-2
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Inside of the while loop, let's add `pause->(1000)` so that we have a pause between each number as it's counting down. Also, let's show `count`!
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```
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let count2 = 0
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while (count2 < 10) {
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basic.pause(1000)
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basic.showNumber(count2, 150)
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count2 = count2 + 1
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}
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while (count2 > 0) {
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basic.pause(1000) // ***
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basic.showNumber(count2, 150) // ***
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}
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```
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* Run the code to see if it works as expected.
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### Challenge 3
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Now, we need `count` to decrease by one after the BBC micro:bit has displayed the value of `count`.
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We can do this by adding this line:
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`count := count - 1`
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