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<A NAME="PETSC_NULL"><H1>PETSC_NULL</H1></A>
standard way of passing in a null or array or pointer
<P>
Notes: accepted by many PETSc functions to not set a parameter and instead use
some default
<P>
This macro does not exist in Fortran; you must use PETSC_NULL_INTEGER,
PETSC_NULL_DOUBLE_PRECISION etc
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PETSC_DECIDE.html#PETSC_DECIDE">PETSC_DECIDE</A>, <A HREF="../Sys/PETSC_DEFAULT.html#PETSC_DEFAULT">PETSC_DEFAULT</A>, <A HREF="../Sys/PETSC_IGNORE.html#PETSC_IGNORE">PETSC_IGNORE</A>, <A HREF="../Sys/PETSC_DETERMINE.html#PETSC_DETERMINE">PETSC_DETERMINE</A>
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../include/petsc.h.html#PETSC_NULL">include/petsc.h</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/sys/examples/tutorials/ex2.c.html">src/sys/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex1.c.html">src/vec/vec/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex1e.c.html">src/vec/vec/examples/tutorials/ex1e.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex3.c.html">src/vec/vec/examples/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex5.c.html">src/vec/vec/examples/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex6.c.html">src/vec/vec/examples/tutorials/ex6.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex9.c.html">src/vec/vec/examples/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex10.c.html">src/vec/vec/examples/tutorials/ex10.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex11.c.html">src/vec/vec/examples/tutorials/ex11.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex12.c.html">src/vec/vec/examples/tutorials/ex12.c.html</A><BR>
<A HREF="../../../src/vec/vec/examples/tutorials/ex16.c.html">src/vec/vec/examples/tutorials/ex16.c.html</A><BR>
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