"Currency Converter"

CurrencyConverter.playground/Contents.swift

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+import UIKit
+
+
+enum Currency {
+    case cad
+    case mxn
+
+}
+
+let usToCad = 1.41
+let usToMxn = 23.93
+
+
+let currency = Currency.mxn //currency type you are converting to
+
+func convert(_ dollars: Double, currencyType: Currency) -> Double {
+
+    var convertedUSD: Double = 1.00
+
+    switch currencyType {
+    case .cad:
+        convertedUSD = dollars * usToCad
+
+    case .mxn:
+        usToMxn
+        convertedUSD = dollars * usToMxn
+
+
+    }
+
+return convertedUSD
+}
+
+print(convert(10, currencyType: .cad))
+
+
+
+
+
+
+
+func convert(amountString: String) -> String? {
+
+let amount = Double(amountString)
+    guard let unwrappedAmount = amount else {return "connot convert to double"}
+
+
+
+    let newTotal = convert(unwrappedAmount, currencyType: .cad)
+
+    let newAmount = String(newTotal)
+
+
+
+    return newAmount
+}
+let convertedAmount = convert(amountString: "10")
+print(convertedAmount as Any)

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>