     print("Hi \(name), from my \(className) class");
 }
 sayHiTeacher7(teacherName: "Sheets", className: "Swift 1")
-//: The above variable parameter `name`'s value was changed within the function body but changing the value of variable parameters has no impact outside of the function.
+//: The above parameter `name`'s value was changed within the function body but changing the value of variable parameters has no impact outside of the function.
 /*:
  ### In-Out Parameters
- As mentioned above, changing the value of a variable parameter doesn't change the value of the argument variable. If you want the changes to a variable parameter to be reflected outside of your function body, you can define the variable parameter with the `inout` keyword. You place an `&` in front of the varable argument to indicate that the function can modify the value.
- */
-// TODO, TODO, TODO, TODO
-
+ As mentioned above, changing the value of a parameter doesn't change the value of the argument variable for value types. If you want the changes to a parameter to be reflected outside of your function body, you can define the parameter with the `inout` keyword. You place an `&` in front of the varable argument to indicate that the function can modify the value.
+ */
 func sayHiTeacher8(name: inout String, _ className: String) {
     
     if !name.hasPrefix("Mr.") {

}
sayHiTeacher3(teacherName: "Mr. Sheets", className: "Swift")
/*:
 ### Omitting External Parameter Names
 You can omit *external* names by using the underscore `_` in front of second or subsequent parameters.
 */
func sayHiTeacher4(name: String, _ className: String) {
    
    print("Hi \(name), from my \(className) class");
}
sayHiTeacher4(name: "Mr. Sheets", "Swift")
/*:
 ### Default Parameter Values
 Function parameters can be set to a default value and omitted from a function call. It's recommended that you place all defaulted parameters at the end of the parameter list.


/*:
 ## Passing parameters
 Functions can be defined with no parameters or with many parameters. The above function `max` is defined with 2 parameters and the `print` function is defined without parameters. Parameters are data types such as `Int`s, `Bool`eans, `String`s and complex types such as [Enumerations](Enumerations) and [Classes & Structures](Classes%20and%20Structures), explained in future sessions.
 */
/*:
 ### Functions Without Parameters
 The above function `sayHiTeacher` is an example of a function defined without parameters.
 */
//: > **Experiment**: Create and call a function to print your name. Define the function with a name of your choice, without parameters and no return value.

/*:
 ### Functions With Multiple Parameters
 The above function `max` is an example of a function defined with multiple parameters. The `min` function is also a function defined with multiple parameters.
 */
func sayHiTeacher2(name: String) {
    
    print("Hi \(name)")
}
sayHiTeacher2(name: "Mr. Sheets")
//: The above statement creates a function `sayHiTeacher2` defined with accepting 1 parameter of type String.
//: > **Experiment**: Create and call a function to print your name and age. Define the function with a name of your choice, with a parameter of a `String` and `Int` data types and no return value.

/*:
 ### Function Parameter Names
 There are two possible names you can give parameters when defining a function. The *parameter name* is only available for use within the function body. The *argument label* is used by the caller to label arguments passed when calling a function. Functions *argument label* and *parameter* names must be unique when defining the function.
 */
/*:
 ### Specifying Argument Label Names
 *Argument label* names are exposed to the caller of the function. *Argument label* and *parameter* names don't have to be the same. The `sayHiTeacher3` function is an example of a function specifying the *argument label* name for the first parameter and using the default *Argument label* name for the second parameter. *Argument labels* are not allowed to be used within the implementation of a function.
 */
func sayHiTeacher3(teacherName name: String, className: String) {
    
