Swift 5: iOS: 13.1 Converts String to Integer, Double, Float, Bool Use : let myString = "51.55522222222" print(myString.toInteger() ?? "") print(myString.toDouble() ?? "") print(myString.toFloat() ?? "") print(myString.toBool() ?? "")

String to Integer (extension).swift

import Foundation
// ...
extension String {
	// Converts String to Integer
	public func toInteger() -> Int? {
		if let num = NumberFormatter().number(from: self) {
			return num.intValue
		} else {
			return nil
		}
	}
	
	//Converts String to Double
	public func toDouble() -> Double? {
		if let num = NumberFormatter().number(from: self) {
			return num.doubleValue
		} else {
			return nil
		}
	}
	
	/// EZSE: Converts String to Float
	public func toFloat() -> Float? {
		if let num = NumberFormatter().number(from: self) {
			return num.floatValue
		} else {
			return nil
		}
	}
	
	//Converts String to Bool
	public func toBool() -> Bool? {
		return (self as NSString).boolValue
	}
}