# PETSC_IGNORE

same as PETSC_NULL, means PETSc will ignore this argument

Notes: accepted by many PETSc functions to not set a parameter and instead use some default

This macro does not exist in Fortran; you must use PETSC_NULL_INTEGER, PETSC_NULL_DOUBLE_PRECISION etc

### See Also

PETSC_DECIDE, PETSC_DEFAULT, PETSC_NULL, PETSC_DETERMINE

Level:beginner
Location:include/petsc.h
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/snes/examples/tutorials/ex5.c.html
src/snes/examples/tutorials/ex14.c.html
src/snes/examples/tutorials/ex19.c.html
src/snes/examples/tutorials/ex22.c.html
src/snes/examples/tutorials/ex24.c.html
src/snes/examples/tutorials/ex26.c.html
src/snes/examples/tutorials/ex27.c.html
src/ts/examples/tutorials/ex7.c.html