Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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

Switch Statement

i can't solve this because i could not quit understand what they want help would be much appreciated

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
    switch key{
        case "europeanCapitals": print("BEL", "LIE", "BGR" )
        case "asianCapitals": print("IND", "VNM")
    default: otherCapitals
    }
    // End code
}

1 Answer

You have a couple of problems here...

First, since you are switching on each key of the world dictionary, each case should have a key or keys it is trying to match. For example, your first case should start with...

case "BEL", "LIE", "BGR":

Second, rather than print out results, they're asking you to build up the arrays they have set up in the first three lines. I used the append function to do this, so my first case looked like this...

case "BEL", "LIE", "BGR": europeanCapitals.append(value)

Hopefully I've given you enough clues here to complete the other lines and pass the challenge.