Math.exp()

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

Math.exp(x)

Parameters

x

A number.

Return value

A nonnegative number representing e^x, 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

• Math.E
• Math.expm1()
• Math.log()
• Math.log10()
• Math.log1p()
• Math.log2()
• Math.pow()