var myInt = parseInt("10.256"); //10 var myFloat = parseFloat("10.256"); //10.256
let myNumber = Number("5.25"); //5.25
new Number(valeur); var a = new Number('123'); // a === 123 donnera false var b = Number('123'); // b === 123 donnera true a instanceof Number; // donnera true b instanceof Number; // donnera false