String to double swift

let lessPrecisePI = Float("3.14")

let morePrecisePI = Double("3.1415926536")
let invalidNumber = Float("alphabet") // nil, not a valid number
//Unwrap the values to use them using if/let

if let cost = Double(textField.text!) {
    print("The user entered a value price of \(cost)")
} else {
    print("Not a valid number: \(textField.text!)")
}
//You can convert formatted numbers and currency using the NumberFormatter class.

let formatter = NumberFormatter()
formatter.locale = Locale.current // USA: Locale(identifier: "en_US")
formatter.numberStyle = .decimal
let number = formatter.number(from: "9,999.99")

Source: stackoverflow.com

Similar codes

1 vote199 views1 answer
How to get image from pdf swift
Swift
0 vote178 views1 answer
Swift foreach with index
Swift
1 vote223 views1 answer
Playing a sound in swift
Swift
0 vote239 views1 answer
Sprite kitYourNextScene
Swift
3 votes206 views1 answer
Variable declaration vs definition vs initialization
Swift
7 votes271 views1 answer
Time formats swift
Swift
0 vote226 views1 answer
TextField.characther range
Swift
0 vote253 views1 answer
Swift subtract dates
Swift
0 vote230 views1 answer
Procedural audio with swift
Swift
0 vote244 views2 answers
Uibutton change text
Swift