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iOS

Jolian Chan
Jolian Chan
4,154 Points
Posted by Jolian Chan
Jolian Chan
4,154 Points

Have a problem with Swift Switch statement

Hi,

I'm practicing the Swift Switch statement, here is the codes

let sales2017 = 4000000.00
let firstTierBounsTarget = 5000000.00
let secondTierBounsTarget = 4000000.00
let thirdTierBounsTarget = 3000000.00

switch sales2017 {
case sales2017 > firstTierBounsTarget: print("2017 Bonus: \(sales2017 * 0.005)")
case sales2017 > secondTierBounsTarget: print("2017 Bonus: \(sales2017 * 0.003)")
case sales2017 > thirdTierBounsTarget: print("2017 Bonus: \(sales2017 * 0.001)")
default: print("No Bonus Annual This Year!!")
}

I get an error on line 7-9, it says " Expression pattern of type 'Bool' cannot match values of type Double." Can everyone point out my mistakes?

Thanks

2 Answers

Everton Carneiro
Everton Carneiro
15,994 Points
Everton Carneiro
Everton Carneiro
15,994 Points

Switch and IF statements are not the same. You cannot compare two values in a case as you do in IF statement because that's is not how switch statement works. You need to check each case regarding the object you are checking. For example:

let number = 10

switch number {
case 10:
    print("It is ten")
default:
    break
}

For the purpose of your code, you can use a case with a range of values. Remember when use conditional statements you need to be specific because for example if a value is higher than 50, it is also higher than 40 and 30. In your code you can do something like this:

let sales2017 = 4000000.00
let firstTierBounsTarget = 5000000.00
let secondTierBounsTarget = 4000000.00
let thirdTierBounsTarget = 3000000.00

switch sales2017 {
case firstTierBounsTarget...100000000000000.00: print("2017 Bonus: \(sales2017 * 0.005)")
case secondTierBounsTarget...firstTierBounsTarget: print("2017 Bonus: \(sales2017 * 0.003)")
case thirdTierBounsTarget...secondTierBounsTarget: print("2017 Bonus: \(sales2017 * 0.001)")
default: print("No Bonus Annual This Year!!")
}

I hope that helps.

Jolian Chan
Jolian Chan
4,154 Points
Jolian Chan
Jolian Chan
4,154 Points

Everton Carneiro, now I got it, thanks for your help.