UNB/ CS/ David Bremner/ teaching/ cs2613/ books/ mdn/ Reference/ Global Objects/ Math/ Math.exp()

The Math.exp() static method returns e raised to the power of a number. That is

π™ΌπšŠπšπš‘.πšŽπš‘πš™(𝚑)=ex\mathtt{\operatorname{Math.exp}(x)} = \mathrm{e}^x

Syntax

Math.exp(x)

Parameters

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()

Math.exp(-Infinity); // 0
Math.exp(-1); // 0.36787944117144233
Math.exp(0); // 1
Math.exp(1); // 2.718281828459045
Math.exp(Infinity); // Infinity

Specifications

Browser compatibility

See also