Floated int get value & fractions in seperate int

Question

Lets say I have

const Price = 279.95;

I want to get out the fraction like below:

const value = 279;
const fraction = 95;

How would I accomplish this? Fraction should always be 2 decimals.

gurvinder372 · Answer 1 · 2017-12-12T13:11:54.363

1

You can split by . after converting the number to String

var getItems = ( num ) => String(num).split(".");
var splitNum = ( num ) => ( items = getItems( num ), { integer : Number(items[0]), fraction : Number(items[1] || 0) } );
console.log( splitNum( 279.95 ) );

Demo

var getItems = ( num ) => String(num).split(".");
var splitNum = ( num ) => ( items = getItems( num ), { integer : Number(items[0]), fraction : Number(items[1] || 0) } );

console.log( splitNum( 279.95 ) );

console.log( splitNum( 279 ) );

edited Dec 12 '17 at 13:11

answered Dec 12 '17 at 12:50

gurvinder372

66,980
10
72
94

1

If the input doesn't contain a decimal, `fraction` will be set to `NaN`. Essentially: `Number(undefined)` – SReject Dec 12 '17 at 13:03
1

@SReject Sure, fixed that part as well. – gurvinder372 Dec 12 '17 at 13:12

score 0 · Answer 2 · edited Dec 12 '17 at 13:13

0

You can do it by using a simple math,

const Price = 279.95;
const value = ~~Price;
const fraction = ~~Math.ceil(((Price - value) * 100));

console.log(value); // 279 
console.log(fraction); // 95

You can get more information about ~~ here.

edited Dec 12 '17 at 13:13

Hassan Imam

21,956
5
41
51

answered Dec 12 '17 at 12:50

Rajaprabhu Aravindasamy

66,513
17
101
130

Your fraction part might come out to be 94 too, if I am not wrong – Parijat Purohit Dec 12 '17 at 12:52
Agree. It returns 94 – Joelgullander Dec 12 '17 at 12:54
@ParijatPurohit We can't guarantee the floating points accuracy. If we need it to be accurate then we have to use `ceil`. – Rajaprabhu Aravindasamy Dec 12 '17 at 12:55
@Codehiker You can get accurate results now. See the update. – Rajaprabhu Aravindasamy Dec 12 '17 at 12:56
Couldn't you just use `Math.round` instead and it will deal with both upper and lower cases – Nick is tired Dec 12 '17 at 12:57
@NickA Using `ceil` would be more relevant here as the error in calculation wont go more than `~0.01`. – Rajaprabhu Aravindasamy Dec 12 '17 at 13:02

SReject · Answer 3 · 2017-12-12T13:18:04.680

For a set number of decimal places:

    const price = 279.95;

    // Double bitwise NOT; Quicker way to do Math.floor(price)
    const value = ~~price;

    // Remove the interger part from the price
    // then multiply by 100 to remove decimal
    const fraction = Math.ceil((price - value) * 100);

    console.log(value, fraction)

If you want to support an arbitrary number of decimal places use this to get the fraction:

// Convert the number to a string
// split the string into an array, delimited by "."
// get the second item(index: 1) from the array
const fraction = String(price).split(".")[1] || 0;

Floated int get value & fractions in seperate int

3 Answers3