Convert NSNumber to NSDecimalNumber
You can do: NSDecimalNumber *decNum = [NSDecimalNumber decimalNumberWithDecimal:[aNumber decimalValue]];
nsdecimalnumber
Swift 3 : Decimal to Int
This is my updated answer (thanks to Martin R and the OP for the remarks). The OP’s problem was just casting the pow(x: Decimal,y: Int) -> Decimal function to an Int after subtracting 1 from the result. I have answered the question with the help of this SO post for NSDecimal and Apple’s documentation on … Read more