---
name: "dasum.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/dasum.f"
---

# dasum.f(3)

## NAME

BLAS/SRC/dasum.f

## SYNOPSIS

### Functions/Subroutines

double precision function **dasum** (n, dx, incx)\
 **DASUM**

## Function/Subroutine Documentation

### double precision function dasum (integer n, double precision, dimension(\*) dx, integer incx)

**DASUM**

**Purpose:**

```
!>
!>    DASUM takes the sum of the absolute values.
!>
```

**Parameters**

*N*

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

*DX*

```
!>          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>
```

*INCX*

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

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Further Details:**

```
!>
!>     jack dongarra, linpack, 3/11/78.
!>     modified 3/93 to return if incx .le. 0.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>
```

Definition at line **70** of file **dasum.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.