---
name: "caxpy.f"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/caxpy.f"
---

# caxpy.f(3)

## NAME

BLAS/SRC/caxpy.f

## SYNOPSIS

### Functions/Subroutines

subroutine **caxpy** (n, ca, cx, incx, cy, incy)\
 **CAXPY**

## Function/Subroutine Documentation

### subroutine caxpy (integer n, complex ca, complex, dimension(\*) cx, integer incx, complex, dimension(\*) cy, integer incy)

**CAXPY**

**Purpose:**

```
!>
!>    CAXPY constant times a vector plus a vector.
!>
```

**Parameters**

*N*

```
!>          N is INTEGER
!>         number of elements in input vector(s)
!>
```

*CA*

```
!>          CA is COMPLEX
!>           On entry, CA specifies the scalar alpha.
!>
```

*CX*

```
!>          CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>
```

*INCX*

```
!>          INCX is INTEGER
!>         storage spacing between elements of CX
!>
```

*CY*

```
!>          CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
!>
```

*INCY*

```
!>          INCY is INTEGER
!>         storage spacing between elements of CY
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Further Details:**

```
!>
!>     jack dongarra, linpack, 3/11/78.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>
```

Definition at line **87** of file **caxpy.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.