Update README.md

Author: jtandy13

README.md

@@ -1 +1,46 @@
-# JavaScript-Closures
+# JavaScript-Closures
+Closures in JavaScript can be a difficult concept to grasp for those either new to the language or new to programming. As part of my own learning process I want to explain closures here to anyone who has struggled to find a simple and concise set of examples.
+
+## What problem do closures solve?
+Closures are one way to solve the problem of having private variables in Javascript.
+
+In a language like C#, the "private" keyword can be used to protect class members from being directly accessed from outside the class. 
+
+Example below taken from https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/private
+```c#
+class Employee
+{
+ private string name = "FirstName, LastName";
+ private double salary = 100.0;
+
+ public string GetName()
+ {
+ return name;
+ }
+
+ public double GetSalary()
+ {
+ return salary;
+ }
+}
+
+class PrivateTest
+{
+ static void Main()
+ {
+ Employee e = new Employee();
+
+ // The data members are inaccessible (private), so
+ // they can't be accessed like this:
+ // string n = e.name;
+ // double s = e.salary;
+
+ // 'name' is indirectly accessed via method:
+ string n = e.GetName();
+
+ // 'salary' is indirectly accessed via method:
+ double s = e.GetSalary();
+ }
+}
+```
+