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

𝙼𝚊𝚝𝚑.𝚎𝚡𝚙(𝚡)=ex\mathtt{\operatorname{Math.exp}(x)} = \mathrm{e}^x

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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 Language Specification
# sec-math.exp

Browser compatibility

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See also