Number.EPSILON

The Number.EPSILON property represents the difference between 1 and the smallest floating point number greater than 1.

Value

2^-52, or approximately 2.2204460492503130808472633361816E-16.

Description

Number.EPSILON is the difference between 1 and the next greater number representable in the Number format, because double precision floating point format only has 52 bits to represent the mantissa, and the lowest bit has a significance of 2^-52.

Note that the absolute accuracy of floating numbers decreases as the number gets larger, because the exponent grows while the mantissa's accuracy stays the same. Number.MIN_VALUE is the smallest representable positive number, which is much smaller than Number.EPSILON.

Because EPSILON is a static property of Number, you always use it as Number.EPSILON, rather than as a property of a number value.