Migrate docs from the other repo

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Michal Moskal
2016-03-25 16:47:20 -07:00
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# jailbreak challenges
Coding challenges for the jailbreak tutorial.#docs
## Before we get started
Complete the following guided tutorial:
* [tutorial](/microbit/lessons/jailbreak/tutorial)
At the end of the tutorial, click `keep editing`. Your code should look like this:
```
count = 0
shouldBreak = false
input.onButtonPressed("A", () => {
shouldBreak = true
})
while (true) {
if (shouldBreak) {
basic.showString("I'M OUT!", 150)
basic.plotImage(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .
`)
break
}
count = count + 1
basic.showNumber(count, 150)
basic.pause(1000)
}
```
**Challenge 1**
Try to remove the `break` in the `if` loop. What problem does this create?
**Challenge 2**
Now let's resume the timer again once button `B` is pressed! To do so, begin by creating a condition to know when button `B` is pressed.
```
// **. . .**
while (true) {
if (shouldBreak) {
basic.showString("I'M OUT!", 150)
basic.plotImage(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .
`)
break
}
count = count + 1
basic.showNumber(count, 150)
basic.pause(1000)
}
input.onButtonPressed("B", () => {
}) // ***
```
Next, set `should break` back to false to indicate we want to run the `while` loop again.
```
// **. . .**
input.onButtonPressed("B", () => {
shouldBreak = false // ***
})
```
And now copy the code from the previous while loop into the condition of `input->on button pressed("B")`. This will resume the counter.
```
// **. . .**
input.onButtonPressed("B", () => {
shouldBreak = false
while (true) {
if (shouldBreak) {
basic.showString("I'M OUT!", 150) // ***
basic.plotImage(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .
`) // ***
break // ***
}
count = count + 1 // ***
basic.showNumber(count, 150) // ***
basic.pause(1000) // ***
}
})
```
**Challenge 3**
Notice that the two `while` loops are identical. Clean up this redundancy in your code by creating another method and then placing the `while` loop in the method.

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# jailbreak quiz answers
break out of a counting loop by pressing button "A" #break #string #variables #docs
This is the answer key for the [jailbreak quiz](/microbit/lessons/jailbreak/quiz).
## 1. What does a 'break' statement do to a 'loop' ?
Exit a while or for loop before the loop is complete.
## 2. Consider the following directions
Write the line of code that will initialize a number `variable` to 0. Then create a second `variable` that tells us when we should `break` out of the loop. Set the `break` to false.
```
count = 0
shouldBreak = false
```
## 3. Consider the following directions
Write the line of code to stop incrementing `count` when the button is pressed. (Hint: This will set `should break` to true).
```
input.onButtonPressed("A", () => {
shouldBreak = true
})
```
## 4. Consider the following directions
Add an `if` statement to determine whether or not we should break out of the loop. Then include the message "I'm Out!" and a smiley face **image** displayed. This will happen right before you `break` from the `while` loop. **Do not include the break **
```
if (shouldBreak) {
basic.showString("I'M OUT!", 150)
images.createImage(`
. # . # .
. # . # .
. . . . .
# . . . #
. # # # .
`).showImage(0)
}
```

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# jailbreak quiz
break out of a counting loop by pressing button "A" #break #string #variables #docs
## Name
## Directions
Use this activity document to guide your work in the [jailbreak tutorial](/microbit/lessons/jailbreak/tutorial)
Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. What does a 'break' statement do to a 'loop' ?
## 2. Consider the following directions
Write the line of code that will initialize a number variable to 0. Then create a second variable that tells us when we should `break` out of the loop. Set the `break` to false.
<br/>
## 3. Consider the following directions
Write the line of code to stop incrementing `count` when the button is pressed. (Hint: This will set `should break` to true).
<br/>
## 4. Consider the following directions
Add an `if` statement to determine whether or not we should break out of the loop. Then include the message "I'm Out!" and a smiley face **image** displayed. This will happen right before you `break` from the `while` loop. **Do not include the break **
<br />
<br/>