https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/round
"If the fractional portion of the argument is greater than 0.5, the argument is rounded to the integer with the next higher absolute value. If it is less than 0.5, the argument is rounded to the integer with the lower absolute value. If the fractional portion is exactly 0.5, the argument is rounded to the next integer in the direction of +8. Note that this differs from many languages' round() functions, which often round this case to the next integer away from zero, instead giving a different result in the case of negative numbers with a fractional part of exactly 0.5."

While rounding towards positive infinity does work for negative numbers, it is not rounding
correctly for exact 0.5 values.

Had a thought, could this anomaly be related to the floating point number of digits to right of zero not matching different browsers and node.js output? hmmmm. . . .

Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.

RobinSun 2019.08.11

While rounding towards positive infinity does work for negative numbers, it is not rounding

correctly for exact 0.5 values.

EDIT:

Had a thought, could this anomaly be related to the floating point number of digits to right of zero not matching different browsers and node.js output? hmmmm. . . .

EDIT: Tue 2019.08.20