---
name: "dlapy3"
section: "3lapack"
platform: "linux"
package: "liblapack-doc"
version: "3.2.1-8"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/dlapy3/3lapack"
---

# dlapy3(3lapack)

returns sqrt(x\*\*2+y\*\*2+z\*\*2), taking care not to cause unnecessary overflow

## NAME

DLAPY3 - returns sqrt(x\*\*2+y\*\*2+z\*\*2), taking care not to cause unnecessary overflow

## SYNOPSIS

- DOUBLE PRECISION

  FUNCTION DLAPY3( X, Y, Z )

- DOUBLE

  PRECISION X, Y, Z

## PURPOSE

DLAPY3 returns sqrt(x\*\*2+y\*\*2+z\*\*2), taking care not to cause unnecessary overflow.

## ARGUMENTS

- X (input) DOUBLE PRECISION

  Y       (input) DOUBLE PRECISION Z       (input) DOUBLE PRECISION X, Y and Z specify the values x, y and z.