Converting String to Int with Swift

Question

The application basically calculates acceleration by inputting Initial and final velocity and time and then use a formula to calculate acceleration. However, since the value

Answer 1

Swift5 float or int string to int:

extension String {
    func convertStringToInt() -> Int {
        return Int(Double(self) ?? 0.0)
    }
}

let doubleStr = "4.2"
// print 4
print(doubleStr.convertStringToInt())

let intStr = "4"
// print 4
print(intStr.convertStringToInt())