stackover flow how to parse number javascript w3school

 var a = parseInt("10") + "<br>";
var b = parseInt("10.00") + "<br>";

 var c = parseInt("10.33") + "<br>";
var d = parseInt("34 45 66") + "<br>";

 var e = parseInt(" 60 ") + "<br>";
var f = parseInt("40 years") + "<br>";

 var g = parseInt("He was 40") + "<br>";

var h = parseInt("10", 10)+ "<br>";

 var i = parseInt("010")+ "<br>";
var j = parseInt("10", 8)+ "<br>";
var k = parseInt("0x10")+ "<br>";
var l = parseInt("10", 16)+ "<br>";


 var n = a + b + c + d + e + f + g + "<br>" + h + i + j + k +l;