pxt-calliope/docs/lessons/answering-machine/challenges.md
2016-03-25 16:47:20 -07:00

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# answering machine blocks challenges
Coding challenges for the answering machine tutorial.
## Before we get started
Complete the [answering machine](/microbit/lessons/answering-machine/activity) activity and your code will look like this:
```blocks
basic.showString("ASK ME A QUESTION")
```
### Challenge 1
### @video td/videos/answering-machine-1
Now we need to reply after someone asks micro:bit a yes or no question. We want to respond `YES` when button `A` is pressed. Add a condition for button `A` and inside it show the string `YES`.
```blocks
basic.showString("ASK ME A QUESTION")
input.onButtonPressed(Button.A, () => {
basic.showString("Yes")
})
```
* `Run` the code to see if it works as expected.
### Challenge 2
### @video td/videos/answering-machine-2
What if micro:bit's answer to the question is no? Let's have `NO` be displayed when button `B` is pressed. Add a condition for button `B` and inside it show the string `NO`.
```blocks
basic.showString("ASK ME A QUESTION")
input.onButtonPressed(Button.A, () => {
basic.showString("Yes")
})
input.onButtonPressed(Button.B, () => {
basic.showString("NO")
})
```
* `Run` the code to see if it works as expected.
**Challenge 3**
When you are asked a yes or no question, do you always say yes or no? Add a condition for `on shake` that displays `MAYBE`.