30-seconds-of-code/snippets/js/s/is-negative-zero.md

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Number is negative zero	snippet	javascript	math	flower-portrait-8	2020-10-20T23:02:01+03:00

Checks if the given value is equal to negative zero (-0).

• Check whether a passed value is equal to 0 and if 1 divided by the value equals -Infinity.

const isNegativeZero = val => val === 0 && 1 / val === -Infinity;

isNegativeZero(-0); // true
isNegativeZero(0); // false