Add Functions MakeCode Lesson

site/content/exercises/makecode/robotics/E7/index.md

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+---
+template: exercise
+title: Functions
+level: 3
+exercise: 7
+category: Robotics
+tags: ['MakeCode', 'Functions', 'CPX']
+description: Creating functions to perform calculations and group commands
+---
+
+* __What are functions?__
+  * Functions are fundamental building blocks of programs\.
+  * They let you name a set of commands\.
+  * Once defined\, a function can be re\-used over and over\.
+* __Examples of functions:__
+  * Add\( _x\, y_ \)
+    * Take two numbers  _x_  and  _y_ \, and return the sum  _x\+y_
+    * \(takes input and returns output\)
+  * TurnOn\( _x_ \)
+    * Take a number between 0 and 9\, and turn on that LED
+    * \(takes input\, does not return output\)
+  * PartyTime\(\)
+    * Set all pixels to red\, play a tune
+    * \(doesn’t take input\, doesn’t return output\)
+
+## Creating Functions
+
+![](Lesson35.png)
+
+## Defining and Calling Functions
+
+![](Lesson38.png)