Swift Riemann Sum Calculator

Harrison Weinerman

//This code works fine in a Swift playground.

let startingX = 0.0
let finishingX = 2.0
//make this smaller for more accuracy but slower calculation times
let increment = 0.1

var area = 0.0

func fOfX(x : Double) -> Double{
//write your function here
    return 8 - pow(x, 2)
}

for var i = startingX; i < finishingX; i += increment {
    area += increment * fOfX(i)
}

println("Area is \(area).")