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iOS Swift 2.0 Collections and Control Flow Control Flow With Conditional Statements Working with Switch Statements

Posted by steve kevin arias serrano
steve kevin arias serrano
9,037 Points

what is wrong with my code

var asianCapitals: [String] = [] var otherCapitals: [String] = []

let world = [ "BEL": "Brussels", "LIE": "Vaduz", "BGR": "Sofia", "USA": "Washington D.C.", "MEX": "Mexico City", "BRA": "Brasilia", "IND": "New Delhi", "VNM": "Hanoi"]

for (key, value) in world { // Enter your code below case "BEL","LIE","BGR": europeanCapitals.append(value) case "IND","VNM": asianCapitals.append(value) default "USA","MEX","BRA": otherCapitals.append(value) // End code }

switch.swift 
var europeanCapitals: [String] = []
var asianCapitals: [String] = []
var otherCapitals: [String] = []

let world = [
  "BEL": "Brussels", 
  "LIE": "Vaduz", 
  "BGR": "Sofia", 
  "USA": "Washington D.C.", 
  "MEX": "Mexico City", 
  "BRA": "Brasilia", 
  "IND": "New Delhi", 
  "VNM": "Hanoi"]

for (key, value) in world {
    // Enter your code below
    case "BEL","LIE","BGR":
    europeanCapitals.append(value)
    case "IND","VNM":
    asianCapitals.append(value)
    default "USA","MEX","BRA":
     otherCapitals.append(value)
    // End code
}

2 Answers

Johanns Gregorian
Johanns Gregorian
8,694 Points
Johanns Gregorian
Johanns Gregorian
8,694 Points

You are missing the switch statement.

Here is what your code should look like:

for (key, value) in world {
    switch key {
    case "BEL","LIE","BGR":
            europeanCapitals.append(value)
    case "IND","VNM":
            asianCapitals.append(value)
    default:
        otherCapitals.append(value)
    }
}

For this exercise, you are evaluating the value of key, so you'll do: switch key { ... }.

One last note, default: does not accept a condition. It's last resort; that is, if all cases above move it fail to match, it will run whatever you have in its scope.

Switch Documentation

Ary de Oliveira
Ary de Oliveira
28,298 Points
Ary de Oliveira
Ary de Oliveira
28,298 Points

Task 1 and 2

var europeanCapitals: [String] = [] var asianCapitals: [String] = [] var otherCapitals: [String] = []

let world = [ "BEL": "Brussels", "LIE": "Vaduz", "BGR": "Sofia", "USA": "Washington D.C.", "MEX": "Mexico City", "BRA": "Brasilia", "IND": "New Delhi", "VNM": "Hanoi"]

for (key, value) in world { switch key { case "BEL","LIE","BGR": europeanCapitals.append(value) case "IND","VNM": asianCapitals.append(value) default: otherCapitals.append(value) } }