parseint javascript

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

parseInt(value);

let string = "321"
console.log(string); // "321" <= string

let number = parseInt(string);
console.log(number) // 321 <=int

var text = '42px';
var integer = parseInt(text, 10);
// returns 42
let myNumber = Number("5.25"); //5.25

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

 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;

 

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

parseInt(" 0xF", 16);
parseInt(" F", 16);
parseInt("17", 8);
parseInt(021, 8);
parseInt("015", 10);
parseInt(15.99, 10);
parseInt("FXX123", 16);
parseInt("1111", 2);
parseInt("15*3", 10);
parseInt("15e2", 10);
parseInt("15px", 10);
parseInt("12", 13);

//Return: 15

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

// parseInt
parseInt("10");//------------ 10
parseInt("10.00");//--------- 10
parseInt("10.33")//--------- 10
parseInt("34 45 66")//------ 34
parseInt("   60   ")//------ 60
parseInt("40 years")//------ 40
parseInt("He was 40")//----- NaN
parseInt("10", 10)//-------- 10
parseInt("010")//----------- 10
parseInt("10", 8)//--------- 8
parseInt("0x10")//---------- 16
parseInt("10", 16)//-------- 16
// parseFloat
parseFloat("10")//-----------10
parseFloat("10.00")//--------10
parseFloat("10.33")//--------10.33
parseFloat("34 45 66")//-----34
parseFloat(" 60 ")//---------60
parseFloat("40 years")//-----40
parseFloat("He was 40");//----NaN
/ mm.mirzaei /

var str = "HELLO WORLD";

var res = str.charAt(0); 

/* 
 * @param string Required. The value to parse. If this argument is not
 * a string, then it is converted to one using the ToString abstract
 * operation. Leading whitespace in this argument is ignored.
 *
 * radix
 * @param radix Optional. An integer between 2 and 36 that represents
 * the radix (the base in mathematical numeral systems) of the string.
 * Be careful—this does not default to 10!
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt#Description
 * for what happens when radix is not provided
 */
parseInt(string, radix);

console.log(parseInt(' 0xF', 16));
// expected output: 1500

console.log(parseInt('321', 2));
// expected output: 0

console.log(parseInt('321', 10));
// expected output: 321