Math.exp()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The Math.exp() static method returns e raised to the power of a number. That is
Try it
console.log(Math.exp(0));
// Expected output: 1
console.log(Math.exp(1));
// Expected output: 2.718281828459 (approximately)
console.log(Math.exp(-1));
// Expected output: 0.36787944117144233
console.log(Math.exp(2));
// Expected output: 7.38905609893065
Syntax
js
Math.exp(x)
Parameters
x-
A number.
Return value
A nonnegative number representing ex, where e is the base of the natural logarithm.
Description
Because exp() is a static method of Math, you always use it as Math.exp(), rather than as a method of a Math object you created (Math is not a constructor).
Beware that e to the power of a number very close to 0 will be very close to 1 and suffer from loss of precision. In this case, you may want to use Math.expm1 instead, and obtain a much higher-precision fractional part of the answer.
Examples
Using Math.exp()
js
Math.exp(-Infinity); // 0
Math.exp(-1); // 0.36787944117144233
Math.exp(0); // 1
Math.exp(1); // 2.718281828459045
Math.exp(Infinity); // Infinity
Specifications
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-math.exp |