74 lines
1.3 KiB
Markdown
74 lines
1.3 KiB
Markdown
# 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](/microbit/lessons/digi-yoyo/activity), your code should look like this:
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```blocks
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let count = 0;
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while (count < 10) {
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basic.pause(100);
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basic.showNumber(count);
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count = count + 1;
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basic.pause(20);
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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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```blocks
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let count = 0;
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while (count < 10) {
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basic.pause(100);
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basic.showNumber(count);
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count = count + 1;
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basic.pause(20);
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}
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while (count > 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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```blocks
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let count = 0;
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while (count < 10) {
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basic.pause(100);
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basic.showNumber(count);
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count = count + 1;
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}
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while (count > 0) {
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basic.pause(100);
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basic.showNumber(count);
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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 micro:bit has displayed the value of `count`.
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We can do this by adding this line:
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```blocks
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let count = count + (count - 1);
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```
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