Number.EPSILON
The smallest interval between two representable numbers, useful for float comparisons.
Syntax
Number.EPSILONReturns
number — Approximately 2.220446049250313e-16 (2^-52).
Examples
console.log(0.1 + 0.2 === 0.3);
Output
false
console.log(Math.abs(0.1 + 0.2 - 0.3) < Number.EPSILON);
Output
true
Notes
Use it as a tolerance when comparing floating-point results that may differ by
tiny rounding errors. For large magnitudes a relative epsilon is more
appropriate than this absolute value.
Browser & runtime support
| Environment | Since version |
|---|---|
| chrome | 34 |
| firefox | 25 |
| safari | 9 |
| edge | 12 |
| node | 0.12 |