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sqrt

The sqrt function in XQuery returns the square root of a non-negative numeric input value.

Syntax

math:sqrt(arg)

The following table describes the argument for this command:

Argument	Required/Optional	Description
arg	Required	A non-negative numeric value to compute the square root of.

Return Value

Returns the square root of the input value as a numeric.

Returns an empty sequence if the input is an empty sequence.

Typically results in an error or empty sequence if the input is negative, as the square root of a negative number is undefined in the real number domain.

Examples

The following table lists some sample values and return values:

SAMPLE FUNCTION	OUTPUT
math:sqrt(9)	3
math:sqrt(0)	0
math:sqrt(2)	1.41421356237
math:sqrt(-1)	Error or empty sequence
math:sqrt(())	()

Additional information

The input must be zero or positive for a real result.

The function returns a numeric value matching the input type or a compatible numeric type.

It handles empty input gracefully by returning an empty sequence.

Math functions

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Design

Design

sqrt

sqrt

Syntax

Return Value

Examples

Additional information