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iOS Swift Basics (retired) Operators Binary Operators

Maikel Visser
Maikel Visser
240 Points
Posted by Maikel Visser
Maikel Visser
240 Points

when i try to use the code let areaInMeters = area / 10.764, i get the error message stating: Binary operator '/' cannot

when i try to use the code let areaInMeters = area / 10.764, i get the error message stating: Binary operator '/' cannot be applied to operands of type 'Int and 'Double'

7 Answers

Steve Hunter
Steve Hunter
57,712 Points

I think it wants the same type of number on both sides of the division. You've got Int / Double. If you decare your area to be a Double, this should be fine. You may be able to cast the int to a double, too.

This is down to 'strong typing' that Swift is very keen on.

I hope that helps.

Steve.

Ninyas Shamoel
Ninyas Shamoel
812 Points
Ninyas Shamoel
Ninyas Shamoel
812 Points

let areaInMeeters = Double(area) / 10.764

Phil Hanson
Phil Hanson
764 Points
Phil Hanson
Phil Hanson
764 Points

Now I am using El Capitan Beta and Xcode 7 Beta but what work for me is as others suggested declaring area as a double.

let areaInMeters = Double(area) / 10.764

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So basically when I divide things it has to be Int / Int, Double / Double, or Float / Float?

Steve Hunter
Steve Hunter
57,712 Points

I think you need to think further than that. You need to think about what is receiving the result too - Int /Int may need the receiver to be expecting a Float as the result is relatively unlikely to be an Int unless we're losing loads of accuracy.

Damien Lavizzo
Damien Lavizzo
4,265 Points
Damien Lavizzo
Damien Lavizzo
4,265 Points

Ninyas' solution worked like a charm for me.

reesesherman
reesesherman
507 Points
reesesherman
reesesherman
507 Points

I get the exact same error, and it won't work no matter the suggestions made.

Scott Graney
Scott Graney
404 Points
Scott Graney
Scott Graney
404 Points

Thank you Ninyas Shamoel