how to change a string to number in javascript

let string = "1";
let num = parseInt(string);
//num will equal 1 as a intvar myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256let theInt = parseInt("5.90123"); //5
let theFloat = parseFloat("5.90123"); //5.90123var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256let myNumber = Number("5.25"); //5.25