# ?lapy3

Returns `sqrt(x2+y2+z2)`.

## Syntax

val = slapy3( x, y, z )

val = dlapy3( x, y, z )

## Description

The function ?lapy3 returns sqrt(x2+y2+z2), avoiding unnecessary overflow or harmful underflow.

## Input Parameters

x, y, z

  REAL for slapy3

  DOUBLE PRECISION for dlapy3

  Specify the input values x, y and z.

## Output Parameters

val

  REAL for slapy3

  DOUBLE PRECISION for dlapy3.

  Value returned by the function.

Parent topic: Auxiliary Routines