pxt-calliope/docs/lessons/counter/challenges.md

38 lines
867 B
Markdown
Raw Normal View History

2016-03-26 00:47:20 +01:00
# counter challenges
Coding challenges for the counter.
## Before we get started
2016-04-13 17:27:45 +02:00
Complete the following [guided tutorial](/lessons/counter/activity) At the end of the tutorial, click **keep editing**. Your code should look like this:
2016-03-26 00:47:20 +01:00
```blocks
let count = 0
input.onButtonPressed(Button.A, () => {
count = count + 1
basic.showNumber(count)
})
```
### Challenge 1
Let's add the code to `count` when `B` is pressed. Add an event handler with `on button pressed(B)` then add the code to `count`.
```blocks
let count = 0
input.onButtonPressed(Button.A, () => {
count = count + 1
basic.showNumber(count)
})
input.onButtonPressed(Button.B, () => {
count = count - 1
basic.showNumber(count)
})
```
### Challenge 3
Now let's try to reset the counter when the micro:bit is shaken. You will need to register an event handler with `on shake`.