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

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2016-03-26 00:47:20 +01:00
# counter quiz
Learn how to create a counter with the BBC micro:bit button.
## Name
## Directions
Use this activity document to guide your work in the [counter tutorial](/microbit/lessons/counter/activity).
Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. What is a variable?
<br/>
## 2. Draw the stored value for the variable called count
```
let count = 0
```
![](/static/mb/empty-microbit.png)
<br/>
## 3. Draw which LEDs are ON after running this code and pressing button "A" once. Explain you chose to draw that number
```
let count_ = 0
input.onButtonPressed("A", () => {
count_ = count_ + 1
basic.showNumber(count_, 100)
})
```
![](/static/mb/empty-microbit.png)
<br/>
## 4. Draw which LEDs are ON after running this code and pressing button "A" three times. Explain you chose to draw that number
```
count_ = 0
input.onButtonPressed("A", () => {
count_ = count_ + 1
basic.showNumber(count_, 100)
})
```
![](/static/mb/empty-microbit.png)
<br/>