This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 1 year ago.
as the title
when I use toFixed to convert the float
(0.2).toFixed(4) -> 0.2000
(444.2).toFixed(4) -> 444.2000
(0.2).toFixed(14) -> 0.20000000000000
(444.2).toFixed(14) -> 444.19999999999999 //why ?!!!
I could not understand that what causes this result.
Is any javascript method to avoid this problem?
Floating point numbers cannot represent all decimals precisely in binary. one way to overcome this problem is using parseFloat:
console.log(parseFloat((444.2).toFixed(14)));
Related
This question already has answers here:
How to deal with floating point number precision in JavaScript?
(47 answers)
Closed 24 days ago.
When I execute the JavaScript code 8/(3-8/3), the result is displayed as 23.99999999999999, but I want to fix it to 24.
In order not to round numbers when they are not repeating decimals or when their repetend is not 9 (e.g. do not round 21.835 to 22; do not round 2.979797979797 to 3), how should I solve this problem?
There doesn't seem to be a clear way to resolve this issue without using some sort of rounding function, but there are alternative ways to write this specific equation, according to MathsIsFun
E.g.
8/(1/3)
This question already has answers here:
Javascript toFixed Not Rounding
(23 answers)
Closed 3 years ago.
I have a question regarding toFixed() function. I have some float numbers e.g. 160.325 and 5.325. The returned value of toFixed() function supposed to be 160.33 and 5.33 respectively but it returns 160.32 for 160.325 and 5.33 for 5.325.
I have tried in different ways,
Number(160.325).toFixed(2)
"160.32"
Number(160.326).toFixed(2)
"160.33"
Number(5.325).toFixed(2)
"5.33"
Number(160.425).toFixed(2)
"160.43"
I expect output to be 160.33 and 5.33.
MDN has added a warning for this unexpected behavior. You can read here
Floating point numbers cannot represent all decimals precisely in binary which can lead to unexpected results
Example:
2.35.toFixed(1); // Returns '2.4'. Note it rounds up
2.55.toFixed(1); // Returns '2.5'. Note it rounds down
This question already has answers here:
Correcting floating math broken by multiplying, is it ok?
(1 answer)
Is floating point math broken?
(31 answers)
Closed 4 years ago.
I have been using this for sometime now before I noticed that is not reliable
Math.floor(16.65*100) / 100 = 16.64
Why does this happen? Any reliable alternative for rounding down safely in JS?
It's because 16.65 * 100 is calculated to 1664.9999999999998
This question already has answers here:
What is the JavaScript >>> operator and how do you use it?
(7 answers)
How do I convert an integer to binary in JavaScript?
(17 answers)
Closed 5 years ago.
I found this code on W3schools for converting decimal into binary.
function dec2bin(dec){
return (dec >>> 0).toString(2);
}
I don't understand what is the purpose for making zero fill right shift in this case? What is the use of setting the shift to 0 (i.e. dec >>> 0) since as I know it doesn't push any binary digit to the right at all?
I am a JS beginner. Thanks!
This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 8 years ago.
I've got the following problem when i'm counting in javascript.
var processAmount = parseFloat(166.98) - parseFloat(61.58);
The result is: 105.39999999999999
Doesnt matter if I use parseFloat() or not.
How can I solve this?
Sometimes floats numbers cannot be represented exactly in binary.
Try this:
var processAmount = parseFloat(166.98) - parseFloat(61.58);
processAmount.toFixed(2);
FROM: Javascript float subtract