     print("You passed in a bad number")
 }
 /*:
-### Clean up after yourself
+Above ...
+*/
+/*:
+## Clean up after yourself
 
 */
 func createMyGrade(number: Int, letter: String) throws -> (Int, String)? {

    return gradeTuple;
}
/*:
### Catch it there

*/

printGrade((101, "A"))
printGrade((55, "E"))
printGrade((94, "A"))
/*:
Above we validate the grade number and grade letter using a `guard` statement and only executing the correct print statement if the grade number and grade letter are in the correct range.
*/
/*:
## Error Handling

