Completed project - Cora Jacobson

CurrencyConverter.playground/Contents.swift

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+import UIKit
+
+/*
+On May 13, 2020
+    $1 USD = $1.41 CAD
+    $1 USD = $24.21 MXN
+*/
+
+enum Currency: String {
+    case cad = "CAD"
+    case mxn = "MXN"
+}
+
+let usToCad = 1.41
+let usToMxn = 24.21
+
+var currency = Currency.cad
+
+func convert(_ dollars: Double) -> Double {
+    switch currency {
+    case .cad:
+        return dollars * usToCad
+    case .mxn:
+        return dollars * usToMxn
+    }
+}
+
+func convert(amountString: String) -> String? {
+    let amount = Double(amountString)
+    guard let unwrappedAmount = amount else {
+        return nil
+    }
+    let convertedAmount = convert(unwrappedAmount)
+    let formatter = NumberFormatter()
+    formatter.numberStyle = .currency
+    if let formattedAmount = formatter.string(for: convertedAmount) {
+        print("\(formattedAmount) \(currency.rawValue)")
+        return "\(formattedAmount) \(currency.rawValue)"
+    } else {
+        return nil
+    }
+}
+
+convert(amountString: "15.00")
+convert(amountString: "25.00")
+
+currency = Currency.mxn
+
+convert(amountString: "15.00")
+convert(amountString: "25.00")

CurrencyConverter.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>