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docs/reference/js/lessons/transformers/quiz-answers.md

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+# transformers quiz answers
+
+Use functions to return values #LED #number #math #functions #return #docs
+
+This is the answer key for the [transformers quiz](/microbit/lessons/transformers/quiz).
+
+## 1. What is a 'function'?
+
+A function is a unit of code that performs a specific task and returns a result.
+
+## 2. Write the line of code to create a number variable called "x" is equal to 5.
+
+<br/>
+
+```
+let x = 5
+```
+
+## 3. Write the line of code to create a condition for 'on button pressed ("A")'
+
+<br/>
+
+```
+input.onButtonPressed("A", () => {
+})
+```
+
+## 4. Write the steps to create a function.
+
+<br/>
+
+Click on `script`, then `add new`, and select `function`.
+
+## 5. Create a function called double that will double whatever input parameter is passed into it.
+
+<br/>
+
+```
+export function double(n: number) : number {
+    let r: number
+    return n * 2
+    return r
+}
+```
+
+## 6. Consider the following directions
+
+Call the `function` that doubles the variable **x**. (The `function` is going to return the doubled value after it is called). Assign the new value (10) to a variable which we will call `doubled`.
+
+<br/>
+
+```
+let doubled = double(x)
+```
+
+## 7. Refer to Question 6
+
+Write the code to call the function that doubles our new `variable` doubled. Assign the new value 20 to a variable we will call doubled twice.
+
+<br/>
+
+```
+let doubleTwice = double(doubled)
+```
+