CODEWITHSUNDEEP
swiftxcode6
Dreamjar
Dreamjar

Reputation: 307

Could not find '+' that accepts the supplied arguments

I am trying to make a monthly Loan payment calculator here is the code for it:

import UIKit

class monthlypayment: UIViewController {



@IBOutlet weak var loanamounttextfield: UITextField!
@IBOutlet weak var numberofmonthstextfield: UITextField!
@IBOutlet weak var loanpercentagetextfield: UITextField!
@IBOutlet weak var answerlabel: UILabel!

@IBAction func calculate(sender: AnyObject) {
    var loanamounttext = loanamounttextfield.text
    var loanamount:Double! = Double((loanamounttext as NSString).doubleValue)
    var loanpercentage = loanpercentagetextfield.text
    var loanpercentagedouble:Double! = Double((loanpercentage as NSString).doubleValue)
    var numbrofmonths = numberofmonthstextfield.text
    var numberofmonths:Double! = Double((numbrofmonths as NSString).doubleValue)
    var rate = loanpercentagedouble/1200
    var monthlypayment:Double = rate+(rate/(1.0+rate)^numberofmonths)-1.0*loanamount
    }
}

I get the error here

        var rate = loanpercentagedouble/1200
        var monthlypayment:Double = rate+  (rate/(1.0+rate)^numberofmonths)-1.0*loanamount

Where numberofmonths and loanamount are doubles as you can see

But I am getting the error: Could not find '+' that accepts the supplied arguments

Upvotes: 0

Views: 40

Answers (1)

Tomas Camin
Tomas Camin

Reputation: 10096

In Swift ^ is the XOR operator (which return various flavours of Ints) not the exponential, you want to use the pow(num, power) function instead

var monthlypayment = rate + pow(rate / (1.0 + rate), numberofmonths) - 1.0 * loan amount

Alternatively you can define a custom operator

infix operator ** { associativity left precedence 160 }

func ** (left: Double, right: Double) -> Double {
    return pow(left, right)
}

And rewrite your code to a more readable

var monthlypayment = rate + (rate / (1.0 + rate)) ** numberofmonths - 1.0 * loanamount

Upvotes: 2

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