Binary Operator '/' cannot be applied to operands of type 'Int' and 'Double'

Using Swift
1

Hey swift forums, I'm getting an error and am not sure how to fix it. Any help would be greatly appreciated.

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2

Hi!
Swift tries to be safe, so operations like "/" and "*" need to be applied between instances of matching types
You can try doing String(Double(previousNumber) / Double(numberOnScreen)) to make sure that both types are the same the operation / is defined on them

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3

That seemed to work but I received another error, "Expected ')' in expression list"
this seems a little too safe in my opinion. Sorry if I seem irritating for not knowing this, I assume it's really simple. Again any help greatly appreciated.

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That seemed to work but I received another error, "Expected ')' in expression list"
this seems a little too safe in my opinion. Sorry if I seem irritating for not knowing this, I assume it's really simple.03%20AM|690x431

5

You missed a closing parenthesis at the end.

6

thanks

7

Also numberOnScreen is already Double. So you don't need to do Double(numberOnScreen), just numberOnScreen

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okay I changed the (numberOnScreen), I don't see exactly where I missed the parenthesis at the end. Also I got a new error...

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I don't see the issue unfortunately

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Could you recompile the proj, they seems to be old error.

Also, do you want "decimal point" in your computation?
That is, should 3/2 be 1 or 1.5?
And do you permit 3.2 + 5.4?

12

Other folks have answered your direct question, but I want to make a bigger picture comment. You have code like his:

label.text = String(xxx)

where xxx is a Double. Presumably label is a UILabel, in which case I recommend that you check out NumberFormatter. You’re currently relying on Swift’s default conversion from Double to String, and that’s not appropriate for user-visible content. NumberFormatter will take care of complexities like:

  • Whether to use point or comma for the decimal separator

  • The separator and grouping of digits in large numbers

  • Folks who prefer other digit representations (for example, Eastern Arabic digits)

ps When you post code, it’s better to post it as text (formatted as a code block) rather than a screen shot, because that way folks can copy snippets from your code.

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Quinn “The Eskimo!” @ DTS @ Apple

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