- TIBCO BusinessEvents®
- Standard
- Math

# Math.sqrt()

## Signature

`double sqrt (double a)`

## Domain

ACTION, CONDITION, QUERY, BUI

## Description

Returns the correctly rounded positive square root of a `double` value. Special cases:
If the argument is NaN or less than zero, then the result is NaN.
If the argument is positive infinity, then the result is positive infinity.
If the argument is positive zero or negative zero, then the result is the same as the argument.
Otherwise, the result is the `double` value closest to the true mathematical square root of the argument value.

## Parameters

Name | Type | Description
--- | --- | ---
`a` | `double` | A value.

## Returns

Type | Description
--- | ---
`double` | The positive square root of `a`. If the argument is NaN or less than zero, the result is NaN.

## Cautions

none