string + number in javascript

console.log(10+"1"); //101   both will be string
console.log(10-"1"); //9     string will be taken as number

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

 var a = parseInt("10");

 

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

var text = '42px';
var integer = parseInt(text, 10);
// returns 42

let myNumber = Number("5.25"); //5.25

var text = '3.14someRandomStuff';
var pointNum = parseFloat(text);
// returns 3.14

// Convert strings
Number('123'); // returns 123
Number('12.3'); // returns 12.3
Number('3.14someRandomStuff'); // returns NaN
Number('42px'); // returns NaN

Number("3.14") // returns 3.14
false.toString()   // returns "false"
String(false)      // returns "false"

const toNumber = str => +str;

// Example
toNumber('42');     // 42