 //: You can start off with this dictionary and string.
 let dictionary = ["monkey": "🐒", "iPhone":"📱"]
 var newestString = sillyMonkeyString
+
+for (word, emoji) in dictionary {
+    newestString = newestString.replacingOccurrences(of: word, with: emoji)
+}
+
+newestString
 //: ### Exercise 8
 //: Josie has been saving her pennies and has them all counted up. Write a program that, given a number of pennies, prints out how much money Josie has in dollars and cents.
 // Example
 let numOfPennies = 567
+
+let numOfDollars = Double(numOfPennies) / 100
+
+"$ \(numOfDollars)"
 //desired output = "$5.67"
 //: # Let or Var?
 import UIKit
 import Foundation
 //: ### Exercise 9
 //: Below is the code to find all the numbers present in an array, convert them to Ints, and calculate their sum. Have a look at the entities declared below: array, sum, and intToAdd. Think about whether each should be a constant or a variable and choose whether to declare them with let or var. When you're finished uncomment the code and see if the compiler agrees with your choices!
-// let or var array = ["A", "13", "B","5","87", "t", "41"] // TODO: Choose constant or variable
-// let or var sum = 0 // TODO: Choose constant or variable
-// for string in array {
-//     if Int(string) != nil {
-//         let or var intToAdd = Int(string)! // TODO: Choose constant or variable
-//         sum += intToAdd
-//     }
-// }
-// print(sum)
+let array = ["A", "13", "B","5","87", "t", "41"]
+var sum = 0
+for string in array {
+    if Int(string) != nil {
+        let intToAdd = Int(string)!
+        sum += intToAdd
+    }
+}
+print(sum)
 //: ### Exercise 10
 //: For each of the following pairs, choose whether to declare a constant or a variable.
 //:

//: 10b) Imagine you are writing an app for a credit card company. Declare two entities: creditLimit and balance.
//: ### Exercise 11
//: Below is the code to reverse a string. Have a look at the entities declared: stringToReverse and reversedString. Choose whether to declare each with let or var. When you're finished uncomment the code and see if the compiler agrees with your choices!
//let or var stringToReverse = "Mutable or Immutable? That is the question." //TODO:Choose let or var
//let or var reversedString = "" //TODO:Choose let or var
//for character in stringToReverse.characters {
//    reversedString = "\(character)" + reversedString
//}
//print(reversedString, terminator: "")




//: ### Exercise 3
//: How many characters are in this string? 
let howManyCharacters = "How much wood could a woodchuck chuck if a woodchuck could chuck wood?"
howManyCharacters.characters.count
//: ### Exercise 4
//: How many times does the letter "g" or "G" appear in the following string? Use a for-in loop to find out!
let gString = "Gary's giraffe gobbled gooseberries greedily"
var count = 0

for character in gString.characters {
    if character == "G" || character == "g" {
        count += 1
    }
}

count
//: ### Exercise 5
//: Write a program that tells you whether or not this string contains the substring "tuna".
let word = "fortunate"

word.contains("tuna")
//: ### Exercise 6
//: Write a program that deletes all occurrences of the word "like" in the following string.
let lottaLikes = "If like, you wanna learn Swift, like, you should build lots of small apps, cuz it's like, a good way to practice."

lottaLikes.replacingOccurrences(of: "like", with: "")
//: ### Exercise 7
// Example
let sillyMonkeyString = "A monkey stole my iPhone"
