CODEWITHSUNDEEP
javascript
HillOfBeans
HillOfBeans

Reputation: 109

Javascript parseFloat parseInt

I'm Learning Javascript.

What does it mean to have parseFloat & parseInt functions in javascript, when in fact, Javascript does not differentiate between float and integer--there is only the Numeric data type.

Seems like they should have created parseNumber to be in alignment with their data types.

Any comments? Maybe somebody knows the reason. It just seems very odd.

Upvotes: 1

Views: 3278

Answers (4)

Hardik Leuwa
Hardik Leuwa

Reputation: 3802

parseFloat() and parseInt() is javascript functions which is basically use to convert string into Float or Integer number

var a = parseInt("10");
  var b = parseInt("10.00");
  var c = parseInt("10.33");
  var d = parseInt("34 45 66");
  var e = parseInt("   60   ");
  var f = parseInt("40 years");
  var g = parseInt("He was 40");

  var h = parseFloat("10");
  var i = parseFloat("10.00");
  var j = parseFloat("34 45 66");
  var k = parseFloat("10.33");
  var l = parseFloat("   60   ");
  var m = parseFloat("40 years");
  var n = parseFloat("He was 40");

 console.log("a : " + a);
 console.log("b : " + b);
 console.log("c : " + c);
 console.log("d : " + d);
 console.log("e : " + e);
 console.log("f : " + f);
 console.log("g : " + g);
 console.log("h : " + h);
 console.log("i : " + i);
 console.log("j : " + j);
 console.log("k : " + k);
 console.log("l : " + l);
 console.log("m : " + m);
 console.log("n : " + n);

Upvotes: 1

Syed Mehtab Hassan
Syed Mehtab Hassan

Reputation: 1337

These functions are basically to parse string data to the relative format so according to the conditions we can use them

The parseInt() function parses a string argument and returns an integer of the specified radix (the base in mathematical numeral systems).

The parseFloat() function parses an argument and returns a floating point number.

console.log(parseInt("1.11"))
console.log(parseFloat("1.11"))

Upvotes: 2

random
random

Reputation: 7899

In JS, there exist Number not parseNumber - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number. It works with numeric value, no matter whether it's float or int.

parseInt or parseFloat are generally used to parse string to number.

In decimal number i:e 10.3 the parseInt only return the number before decimal and discard everything after it, whereas with parseFloat it does consider the digits after decimal.

const num = 10.3;

console.log(parseInt(num));
console.log(parseFloat(num));

Upvotes: 1

Programnik
Programnik

Reputation: 1565

parseInt("1.0") will be same as parseInt("1.1") parseFloat("1.0") will be different to parseFloat("1.1")

Upvotes: 2

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