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file management quizzes

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Michael Elliot Braun
2016-03-29 15:14:16 -07:00
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docs/reference/js/lessons/counter/quiz-answers.md
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# counter quiz answers
Learn how to create a counter with the BBC micro:bit button.
This is the answer key for the [counter quiz](/microbit/lessons/counter/quiz).
## 1. What is a variable?
Answers may vary but a variable is a place where you can store and retrieve data
## 2. Draw the stored value for the variable called count
```
let count = 0
```
![](/static/mb/lessons/counter-0.png)
We create a **variable**, `count` to keep track of the current count. The number 0 is stored into memory of the variable.
<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, 150)
})
```
![](/static/mb/lessons/counter-1.png)
We are only pressing on button pressed once. So the number to display on the micro:bit is also one.
<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/lessons/counter-2.png)
We included the code ``on button pressed("A")`` that runs each time the user presses A. The code increments `count` by `1`. We increase `count` by 1 whenever the user presses the button. So the third time the A button is pressed on the BBC micro:bit, the number 3 is displayed
<br/>

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docs/reference/js/lessons/counter/quiz.md
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# 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/>