[Bug]: A problem about rounding double precision floating point numbers

[ayuan0828]

ChakraCore Version

36becec

Steps to reproduce

When I use the 'print()' method to output an array containing a specific double-precision floating-point number, there is an unexpected rounding error in the last digit. Should the binary representation of the value be stored accurately?

Proof of concept

const testNumber = 9.758231785433683;
const numberArray = [testNumber];
print(numberArray);

Exception or Error

9.758231785433682

Additional Context

No response

[Owaiseimdad]

@ayuan0828 this is because of small rounding error. Where in the code we are using the above example and relying on more than 10th precision?

[ayuan0828]

It was discovered during use and I was just a little curious as to why ChakraCore was implemented this way.