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

amber razzouk
amber razzouk
1,391 Points
Posted by amber razzouk
amber razzouk
1,391 Points

Switch statements: Don't know where to even start

I'm overwhelmed and don't even know where to start here. I understand how to wrIte the switch statement but I'm lost on where to being and what I'm actually to do. HELP PLEASE!

operators.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

    // End code
}

1 Answer

Shade Wilson
Shade Wilson
9,002 Points
Shade Wilson
Shade Wilson
9,002 Points

Hi Amber,

What they want you to do here is to use a switch statement to sort the cities into their respective arrays: europeanCapitals, asianCapitals, and otherCapitals. If you're not sure which countries go to which regions:

  • LIE", "BGR", "BEL" are all european countries
  • "IND", "VNM" are asian countries
  • "USA", "MEX", "BRA" fall into the other capitals category

The basic syntax of a switch statement is Swift is

switch someValueToConsider {
case valueOne: //[response to valueOne]
case valueTwo: //[response to valueTwo]
default: //[response in the case that neither valueOne or valueTwo match someValueToConsider]
}

In this challenge, they're asking you to switch on the key of the dictionary world, and to append the value when the key is matched. In case you forgot, the syntax for appending something to an array is

europeanCapitals.append(value)

Here's some code to get you started. Just take out the comments and plug in your own code!

for (key, value) in world {
    // Enter your code below
    switch key {
    case // [european capital]: [append to europeanCapitals]
    case // [asian capital]: [append to asianCapitals]
    default: // [append to otherCapitals]
    }
    // End code
}