PetscArgScalar — PETSc 3.25.2 documentation

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# PetscArgScalar

Returns the argument (phase angle) of a `PetscScalar` value, as a `PetscReal`; for real `PetscScalar` this is `0` for nonnegative values and `PETSC_PI` otherwise

## Synopsis

    #include <petscmath.h>
    PetscReal PetscArgScalar(PetscScalar a)

Not Collective; No Fortran Support

## Input Parameter

. a - the value

## See Also

`PetscReal`, `PetscScalar`, `PetscComplex`

## Level

beginner

## Location

include/petscmath.h

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