Issue in toFixed function of Javascript

Question

I find a biggest problem with toFixed(2) i.e. if i write 5.555 then it will display 5.55 and if I write 5.565 then it will display 5.57. What should I do?

This is what i am doing. Declaring one array and toFixed all values of first array and put in second array.

var arr1 = [25.205,25.215,25.225,25.235,25.245,25.255,25.265,25.275,25.285,25.295]

var arr2 = []

for(i=0;i<10;i++){ arr2[i]= +arr1[i].toFixed(2) }

Results:

arr1 = [25.205, 25.215, 25.225, 25.235, 25.245, 25.255, 25.265, 25.275, 25.285, 25.295]

arr2 = [25.2, 25.21, 25.23, 25.23, 25.25, 25.25, 25.27, 25.27, 25.29, 25.3]

should i have to use the Math.floor() method of the Math object for this.

Math.floor(number*100)/100

I Have post some code. for values 25.225 and 25.235, after toFixed(2) it give result 25.23. — Kaushal Khamar, Mar 12 '15 at 10:22
for 25.225 it gives 25.23. but for 25.235 it should give 25.24. — Kaushal Khamar, Mar 12 '15 at 10:26
Hey that is strange. You should simplify your question a bit without the arrays etc... Heres the problem: `alert(2.225.toFixed(2)); /* <- 2.23, as expected (rounded up) */ alert(2.235.toFixed(2)); /* <- 2.23, expected 2.24 (rounded down) */ alert(2.245.toFixed(2)); /* <- 2.25, as expected (rounded up) */` Thats the main issue I'de like to know the answer to as well. — somethinghere, Mar 12 '15 at 10:43
@NoDownvotesPlz It should work like this 25.225 -> 25.23. 25.235 -> 25.24 — Kaushal Khamar, Mar 12 '15 at 11:15
@KaushalKhamar read this http://stackoverflow.com/a/12105938/3556874 — Naeem Shaikh, Mar 12 '15 at 11:24
possible duplicate of [toFixed javascript function giving strange results?](http://stackoverflow.com/questions/12105787/tofixed-javascript-function-giving-strange-results) — Naeem Shaikh, Mar 12 '15 at 11:24
http://www.ecma-international.org/ecma-262/5.1/#sec-15.7.4.5 specifies 'exact mathematical value', so fractions ending in 5 should always round up. — 1983, Mar 12 '15 at 11:33

score 1 · Answer 1 · edited May 23 '17 at 12:07

1

This is due to the binary representations of the fractions being slightly more or less than the numbers entered. See the accepted answer HERE for an alternative method of rounding to 2 significant figures.

edited May 23 '17 at 12:07

Community

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answered Mar 12 '15 at 10:52

sideroxylon

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score 0 · Accepted Answer · answered Mar 13 '15 at 05:31

I have create a function which done all for me..

function toFixed(number, precision) {
    var multiplier = Math.pow(10, precision + 1),
        wholeNumber = Math.floor(number * multiplier);
    return Math.round(wholeNumber / 10) * 10 / multiplier;
}

//Call this function to retrive exect value
toFixed((+adjustmentval), 2);

Issue in toFixed function of Javascript

2 Answers2

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