From b56d24e1b943b9a209137ba3c2d42b10401c7767 Mon Sep 17 00:00:00 2001
From: Matt Huntington <matt.huntington@gmail.com>
Date: Sun, 21 Aug 2016 15:58:57 -0400
Subject: [PATCH] functions and scope section

---
 javascript.md | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/javascript.md b/javascript.md
index a5da3c0..04c3471 100644
--- a/javascript.md
+++ b/javascript.md
@@ -29,6 +29,50 @@ foo = 123.4;
 ```
 
 ## Functions and Scope
+
+Declare functions with keyword `function`.  Do not need to specify return type.
+
+```javascript
+function myFunc(){
+	return 5;
+}
+```
+
+To execute a function, invoke its name with parentheses
+
+```javascript
+myFunc();
+```
+
+Can pass parameters into functions
+
+```javascript
+function addFive(numberToAddFiveTo){
+	return numberToAddFiveTo + 5;
+}
+addFive(6); // returns 11
+```
+
+Variables declared inside a function cannot be accessed outside of it
+
+```javascript
+function foo(){
+	var myVar = 1;
+	return myVar;
+}
+console.log(myVar); // error
+```
+
+but variables declared outside a function are accessible within it
+
+```javascript
+var myVar = 1;
+function foo(){
+	return myVar;
+}
+console.log(foo());
+```
+
 ## Objects/Arrays
 ## Equality
 ## Control Flow (loops, if/else)