 */
 
 /*:
-## `switch` statment
+## `switch` statement
+A switch statement allows you to define what happens for specific values of a variable.
+Here, we decide what to do based on what `grade` is. We could do the same thing with lots of `if` statements, but the `switch` syntax is more compact and easier to read.
 */
 
 let grade = "A"


/*:
## `while` Loops
A `while` loop keeps running as long as its condition is `true`
*/

var result = 1

println(result)

/*:
`result` will be updated as follows: 1, 5, 25, 50, 125. Notice that the loop ran 4 times, but it stopped once `result` became more than 60.

The format for `while` loops is:

while condition {
