Let's Loop...

While loop - checking condition before running the code.

Repeat while - Running the code before checking condition.

== While Loop Guessing Game ==

import Foundation // import foundation framework which has random number generator

let numberIAmThinking = 20

var currentGuess = -1

print("Thinking of a number between 1 and 20. Guess what it is.")

while currentGuess != numberIAmThinking {

//While will run until condition is not true

//Int(arc4dandom_uniform(20) creates a random # 0 to 19

currentGuess = Int(arc4random_uniform(20)) + 1

print("Hmmm... Let me guess. Is it \(currentGuess)")

}

print("The current guess number is \(currentGuess)")

== Repeat While - Let's Shrink Me - ==

import Foundation

var shrinking = "Help, I am shrinking away...!"

repeat {

print(shrinking)

shrinking = String(shrinking.characters.dropLast())

}

while shrinking.characters.count > 0

== Homework ==

- Create 1 variable for each student name in the class

- Concatenate the variables

- Use while or repeat while to shrink the name to 3 characters