how to change a string to number in javascript

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

let theInt = parseInt("5.90123"); //5
let theFloat = parseFloat("5.90123"); //5.90123

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

var x = parseInt("1000", 10); // you want to use radix 10
    // so you get a decimal number even with a leading 0 and an old browser ([IE8, Firefox 20, Chrome 22 and older][1])

var x = Number("1000")

var x = Number("1000")