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iOS Swift 2.0 Basics Swift Operators Working With Operators: Part 2

Kelly Sullivan
Kelly Sullivan
412 Points
Posted by Kelly Sullivan
Kelly Sullivan
412 Points

Stuck on task 2 of Swift 2.0 Basics Challenge, Unary Operators

This is the task... "In this game of ours, we have an odd scoring mechanism . At the end of the round, if your score is 10, you lose! If it's anything but 10, you win.

Declare a constant named isWinner and assign the results of a comparison operation to check whether the player has won or not. If the total score is not 10, then the player has won, otherwise he or she has lost. (Hint: Use the NOT operator)"

I'm not sure how to write the comparison operation

operators2.swift 
// Enter your code below

var initialScore = 8
let totalScore = ++initialScore

let isWinner = true
isWinner != 10

4 Answers

henriquegiuliani
henriquegiuliani
12,296 Points

The challenge title is a little confusing, but try this:

var initialScore = 8
let totalScore = ++initialScore
let isWinner = totalScore != 10
Kelly Sullivan
Kelly Sullivan
412 Points
Kelly Sullivan
Kelly Sullivan
412 Points

Thanks! I think I was overcomplicating it. This works and now that I look at it, it makes perfect sense. Thanks for the quick response!

henriquegiuliani
henriquegiuliani
12,296 Points
henriquegiuliani
henriquegiuliani
12,296 Points

Hmmm, so you can use:

var initialScore = 8
let totalScore = ++initialScore
let isWinner: Bool

if(totalScore != 10){
   isWinner = true
}else{
   isWinner = false
}
Anthia Tillbury
Anthia Tillbury
3,388 Points
Anthia Tillbury
Anthia Tillbury
3,388 Points

I did the following for pt.1, what is wrong please?

var initialScore = 8
var totalScore = 1


if totalScore > 0 {
    totalScore + 1
    initialScore = initialScore + totalScore
    totalScore = initialScore
}
Anthia Tillbury
Anthia Tillbury
3,388 Points
Anthia Tillbury
Anthia Tillbury
3,388 Points

For the second answer I used the following code:

var initialScore = 8
let isWinner = 10


let totalScore = ++initialScore


if isWinner != 10 {
    print("You Won!")
}

else {
    print("You Lost!")
}

Again, it's not accepted, how come?