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Michael Elliot Braun
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docs/reference/js/lessons/looper/quiz-answers.md
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# looper quiz answers
Learn how to create a series of numbers with a for loop. #LED #screen #plot #docs
This is the answer key for the [looper quiz](/microbit/lessons/looper/quiz).
## 1. What is a for loop?
Answers will vary. In general, for loop refers to the code that repeats for a fixed number of times. We specify the LED using x, y coordinates.
## 2. Consider the following code
```
for (let i = 0; i < 4; i++) {
basic.showNumber(i, 150)
}
```
If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed. Explain why that particular area is shaded.
Let's create a for loop where `0` is the loop's starting value, `i` is the index variable, and `4` is the ending value. The index variable `i` starts at 0 and increases by 1 each time through the loop. The loop ends when `i = 4`.
![](/static/mb/lessons/looper-0.png)
## 3. Consider the following code
```
for (let i1 = 0; i1 < 6; i1++) {
basic.showNumber(i1, 150)
}
```
If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed. Explain why that particular area is shaded.
Let's create a for loop where `0` is the loop's starting value, `i` is the index variable, and `6` is the ending value. The index variable `i` starts at 0 and increases by 1 each time through the loop. The loop ends when `i = 6`.
![](/static/mb/lessons/looper-0.png)
![](/static/mb/lessons/looper-1.png)

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docs/reference/js/lessons/looper/quiz.md
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# looper quiz
Learn how to create a series of numbers with a for loop. #LED #screen #plot #docs
## Name
## Directions
Use this activity document to guide your work in the [looper tutorial](/microbit/lessons/looper/tutorial)
Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. Describe what a "for loop" does?
<br/>
## 2. Draw the areas where the LEDs will be lit based on the code below. Explain why you chose to draw those numbers.
```
for (let i = 0; i < 4; i++) {
basic.showNumber(i, 150)
}
```
![](/static/mb/lessons/looper-2.png)
<br/>
## 3. Draw the areas where the LEDs will be lit based on the code below. Explain why you chose to draw those numbers.
```
for (let i1 = 0; i1 < 6; i1++) {
basic.showNumber(i1, 150)
}
```
![](/static/mb/lessons/looper-3.png)
![](/static/mb/lessons/looper-3.png)
<br/>