105 lines
2.1 KiB
Markdown
105 lines
2.1 KiB
Markdown
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# jailbreak challenges
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Coding challenges for the jailbreak tutorial.#docs
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## Before we get started
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Complete the following guided tutorial:
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* [tutorial](/microbit/lessons/jailbreak/tutorial)
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At the end of the tutorial, click `keep editing`. Your code should look like this:
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```
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count = 0
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shouldBreak = false
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input.onButtonPressed("A", () => {
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shouldBreak = true
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})
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while (true) {
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if (shouldBreak) {
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basic.showString("I'M OUT!", 150)
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basic.plotImage(`
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. # . # .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`)
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break
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}
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count = count + 1
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basic.showNumber(count, 150)
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basic.pause(1000)
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}
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```
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**Challenge 1**
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Try to remove the `break` in the `if` loop. What problem does this create?
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**Challenge 2**
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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.
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```
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// **. . .**
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while (true) {
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if (shouldBreak) {
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basic.showString("I'M OUT!", 150)
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basic.plotImage(`
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. # . # .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`)
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break
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}
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count = count + 1
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basic.showNumber(count, 150)
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basic.pause(1000)
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}
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input.onButtonPressed("B", () => {
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}) // ***
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```
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Next, set `should break` back to false to indicate we want to run the `while` loop again.
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```
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// **. . .**
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input.onButtonPressed("B", () => {
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shouldBreak = false // ***
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})
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```
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And now copy the code from the previous while loop into the condition of `input->on button pressed("B")`. This will resume the counter.
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```
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// **. . .**
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input.onButtonPressed("B", () => {
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shouldBreak = false
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while (true) {
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if (shouldBreak) {
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basic.showString("I'M OUT!", 150) // ***
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basic.plotImage(`
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. # . # .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`) // ***
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break // ***
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}
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count = count + 1 // ***
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basic.showNumber(count, 150) // ***
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basic.pause(1000) // ***
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}
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})
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```
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**Challenge 3**
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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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