?lapy3

Returns sqrt(x²+y²+z²).

Syntax

val = slapy3( x, y, z )

val = dlapy3( x, y, z )

Include Files

The FORTRAN 77 interfaces are specified in the mkl_lapack.fi include file (to be used in Fortran programs) and in the mkl_lapack.h include file (to be used in C programs).

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.