This question already has answers here:
How to deal with floating point number precision in JavaScript?
(47 answers)
Closed 8 years ago.
When I multiply 3 * 1.1 in JavaScript instead of returning 3.3, it results in 3.30000000000000003, Why is this?
That's because numbers in computers are represented as floating point numbers, which have limited precision. Some operations will cause tiny errors and there's nothing you can do about that.
It's also a reason to never compare numbers using ==.
Related
This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 4 years ago.
I have obscurity. Why if I multiply
8.2 * 1000000 = 8199999.999999999
But if i mul to
8.2 * 1000 = 8200
Maybe advice me topic about this issue.
The floating point representation of JavaScript has a limited accuracy; its resolution decreases as the absolute value of the data grows (which is the case for all implementations of floating point data types). This is also discussed here.
This question already has answers here:
How to deal with floating point number precision in JavaScript?
(47 answers)
Is it possible to achieve arbitrary-precision arithmetic with no rounding issues in JavaScript?
(1 answer)
javascript - More accurate value of Pi? [duplicate]
(2 answers)
Closed 4 years ago.
I'm trying to do some floating number calculation with javascript that requires high accuracy
when I tried to initiate a variable like this:
const pi = 3.141592653589793238462643383280
System will truncate number to
>pi
>3.141592653589793
How can I do calculating with long decimal digits? thanks!
You can use a library like say for example http://mikemcl.github.io/decimal.js/
This question already has answers here:
Is floating point math broken?
(31 answers)
How to deal with floating point number precision in JavaScript?
(47 answers)
Closed 6 years ago.
I get the strangest result when I multiply 1.09 and 12.
Actually 13.080000000000002 instead 13.08!!!
What causes this?
nd what is the solution
console.log(1.09*12);
Regards.
As explained here:
In JavaScript all numbers are IEEE 754 floating point numbers. Due to the binary nature of their encoding, some decimal numbers cannot be represented with perfect accuracy. This is analagous to how the fraction 1/3 cannot be accurately represented with a decimal number with a finite number of digits. Once you hit the limit of your storage you'll need to round the last digit up or down.
This question already has answers here:
How to deal with floating point number precision in JavaScript?
(47 answers)
Closed 7 years ago.
In Javascript following number
9999999999999999.99
Gets converted in to
10000000000000000
How can I prevent this behaviour?
It's my understanding that the best way to deal with this is to do all your calculations in whole numbers, and divide by 100 (or plus as many zeros as needed) afterwards.
If you absolutely need to use decimals, this post contains a lot of useful information that should be of use to you.
This question already has answers here:
How to deal with floating point number precision in JavaScript?
(47 answers)
Closed 7 years ago.
Why is it that trying to add 2.05 with 1.01
returns this value?
console.log(2.05+1.01); // -> 3.0599999999999996?
is using toFixed() the only way around it?
console.log((2.05+1.01).toFixed(2))
How can I avoid this behavior, so it won't get me by surprise in the inner calculations of my code.
This is because javascript's floating point precision only goes up to 14 places. The only real ways around it are multiplying each number by a high number or doing what you said.