- TIBCO BusinessEvents®
- Standard
- Math

# Math.exp()

## Signature

`double exp (double a)`

## Domain

ACTION, CONDITION, QUERY, BUI

## Description

Returns Euler's number e raised to the power of a `double` value. Special cases:
If the argument is NaN, the result is NaN.
If the argument is positive infinity, then the result is positive infinity.
If the argument is negative infinity, then the result is positive zero.
A result must be within 1 ulp of the correctly rounded result. Results must be semi-monotonic.

## Parameters

Name | Type | Description
--- | --- | ---
`a` | `double` | The exponent to raise e to.

## Returns

Type | Description
--- | ---
`double` | The value e`a`, where e is the base of the natural logarithms.

## Cautions

none