This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 1 year ago.
Every time I do something like + 1.6 or something that's a decimal, I get a lot of random numbers spammed behind the result. how to avoid?
var test = 1.2345;
console.log(test.toFixed(2))
// It will trim the result to the specified decimal places.
// |----> output will be 1.23 in thid case... It will keep upto 2 decimal places
Related
This question already has answers here:
Truncate (not round off) decimal numbers in javascript
(32 answers)
Truncate number to two decimal places without rounding
(43 answers)
Closed 4 months ago.
I am trying to figure out how to prevent rounding of numbers when it comes to decimal precisions. I am currently using the .toFixed(2) method to only display two decimal places after the decimal but it is also rounding this figure. For example, if I had a number 19.528 the method Number(19.528).toFixed(2) will yield 19.53 instead of displaying the value 19.52 . Is there anyway or other method to take care of it so that the number does not round?
This question already has answers here:
How to deal with floating point number precision in JavaScript?
(47 answers)
Closed 5 years ago.
for example in javascript addition of 1 + 0.59 is 1.5899999999999999 but I want output of 1.59 which looks right to me.
Use .toFixed() to round your number.
alert((1+0.58999999999).toFixed(2));
This question already has answers here:
Large numbers erroneously rounded in JavaScript
(6 answers)
Javascript parseInt() with leading zeros
(7 answers)
Closed 7 years ago.
I'm trying to convert a string to number in Javascript, but here is my problem :
var string = "068999999501111443";
parseInt(string); // 68999999501111440
Number(string); // 68999999501111440
Why does this happen and how to fix it ?
Thanks
This is because the number is too large to be stored accurately. It is being stored as a floating point number, which can only store a certain amount of precision. Beyond it's maximum precision, you'll get what look like weird rounding errors.
You'll get similar effects for decimals with a large number of decimal places. This is more well known, as it tends to occur more often, but it's exactly the same effect that is happening here.
This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 7 years ago.
Why does javascript returns so many zeros and not just 0.24
And how can i disable javascript to do this. Because when im using a calculator i never get the result 0.24000000000002
var sum = (0.0001 * 2400);
result 0.2400000000002
The reason for this is that your sum is a float which are known to not be very precise. This is a limitation of float values.
To fix this you need to round the decimals by either Math.round or .toFixed.
javascript always do that but you can make it show only 2 digits after the dot.
var sum = (0.0001 * 2400);
alert(sum.toFixed(2));
This question already has answers here:
How to round to at most 2 decimal places, if necessary
(91 answers)
Closed 8 years ago.
I have the following number
0.135
I'd like to round it to 2 decimal places, I'm using...
(newCostDiff/2).toFixed(2)
only this returns
0.13
Can anyvody advise me on how to do this?
What's need of jquery
var newCostDiff = 0.135;
Math.round(newCostDiff *100)/100; //returns 0.14
You should first multiply the result by 10^(number of decimals), then round the number, than divide this number by 10^(number of decimals).
In this case:
Math.round((newCostDiff/2)*100) / 100;