v?Abs

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 4/28/2026

Version

Public

v?Abs

vsAbs vdAbs vmsAbs vmdAbs vcAbs vmcAbs vzAbs vmzAbs Computes absolute value of vector elements.

Syntax

call vsabs ( n , a , y )

call vsabsi(n, a, inca, y, incy)

call vmsabs ( n , a , y , mode )

call vmsabsi(n, a, inca, y, incy, mode)

call vdabs ( n , a , y )

call vdabsi(n, a, inca, y, incy)

call vmdabs ( n , a , y , mode )

call vmdabsi(n, a, inca, y, incy, mode)

call vcabs ( n , a , y )

call vcabsi(n, a, inca, y, incy)

call vmcabs ( n , a , y , mode )

call vmcabsi(n, a, inca, y, incy, mode)

call vzabs ( n , a , y )

call vzabsi(n, a, inca, y, incy)

call vmzabs ( n , a , y , mode )

call vmzabsi(n, a, inca, y, incy, mode)

Include Files

mkl_vml.f90

Input Parameters

Name	Type	Description
`n`	INTEGER, INTENT(IN)	Specifies the number of elements to be calculated.
`a`	Fortran 77: DOUBLE PRECISION for `vdabs` , `vmdabs`Fortran 77: COMPLEX for `vcabs` , `vmcabs`Fortran 77: DOUBLE COMPLEX for `vzabs` , `vmzabs`Fortran 90: REAL , INTENT(IN) for `vsabs` , `vmsabs`Fortran 90: DOUBLE PRECISION , INTENT(IN) for `vdabs` , `vmdabs`Fortran 90: COMPLEX , INTENT(IN) for `vcabs` , `vmcabs`Fortran 90: DOUBLE COMPLEX , INTENT(IN) for `vzabs` , `vmzabs`	Array that specifies the input vector `a` .
`inca` , `incy`	INTEGER, INTENT (IN)	Specifies increments for the elements of `a` and `y` .
`mode`	INTEGER(KIND=8), INTENT(IN)	Overrides global VM mode setting for this function call. See vmlSetMode (Sets a new mode for VM functions according to the mode parameter and stores the previous VM mode to oldmode.) for possible values and their description.

Output Parameters

Name	Type	Description
`y`	Fortran 77: DOUBLE PRECISION for `vdabs` , `vmdabs` , `vzabs` , `vmzabs`Fortran 90: REAL , INTENT(OUT) for `vsabs` , `vmsabs` , `vcabs` , `vmcabs`Fortran 90: DOUBLE PRECISION , INTENT(OUT) for `vdabs` , `vmdabs` , `vzabs` , `vmzabs`	Array that specifies the output vector `y` .

Description

The v?Abs function computes an absolute value of vector elements.

Special Values for Real Function v?Abs(x)

Argument	Result	Exception
+0	+0
-0	+0
∞	∞
∞	∞
QNAN	QNAN
SNAN	QNAN	INVALID

Specifications for special values of the complex functions are defined according to the following formula

\(Abs(z) = Hypot(RE(z),IM(z))\) .

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

v?Abs

Syntax

Include Files

Input Parameters

Output Parameters

Description