Skip to main content
`Ctrl`+`K`

# PetscScalar

PETSc type that represents either a double precision real number, a double precision complex number, a single precision real number, a __float128 real or complex or a __fp16 real - if the code is configured with `--with-scalar-type`=real,complex `--with-precision`=single,double,__float128,__fp16

## Note

For MPI calls that require datatypes, use `MPIU_SCALAR` as the datatype for `PetscScalar` and `MPIU_SUM`, etc for operations. They will automatically work correctly regardless of the size of `PetscScalar`.

## See Also

`PetscReal`, `PetscComplex`, `PetscInt`, `MPIU_REAL`, `MPIU_SCALAR`, `MPIU_COMPLEX`, `MPIU_INT`, `PetscRealPart()`, `PetscImaginaryPart()`

## Level

beginner

## Location

include/petscsystypes.h

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages