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<div id="version" align=right><b>slepc-3.22.2 2024-12-02</b></div>
<div id="bugreport" align=right><a href="mailto:slepc-maint@upv.es?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: slepc-3.22.2 v3.22.2 docs/manualpages/MFN/MFNGetIterationNumber.html "><small>Report Typos and Errors</small></a></div>
<H1>MFNGetIterationNumber</H1>
Gets the current iteration number. If the call to <A HREF="../MFN/MFNSolve.html#MFNSolve">MFNSolve</A>() is complete, then it returns the number of iterations carried out by the solution method.
<H3><FONT COLOR="#883300">Synopsis</FONT></H3>
<PRE>
#include "slepcmfn.h"
<A HREF="https://petsc.org/release/manualpages/Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../MFN/MFNGetIterationNumber.html#MFNGetIterationNumber">MFNGetIterationNumber</A>(<A HREF="../MFN/MFN.html#MFN">MFN</A> mfn,<A HREF="https://petsc.org/release/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</A> *its)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#883300">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mfn </B></TD><TD> - the matrix function context
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>its </B></TD><TD> - number of iterations
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#883300">Note</FONT></H3>
During the i-th iteration this call returns i-1. If <A HREF="../MFN/MFNSolve.html#MFNSolve">MFNSolve</A>() is
complete, then parameter "its" contains either the iteration number at
which convergence was successfully reached, or failure was detected.
Call <A HREF="../MFN/MFNGetConvergedReason.html#MFNGetConvergedReason">MFNGetConvergedReason</A>() to determine if the solver converged or
failed and why.
<P>
<P>
<H3><FONT COLOR="#883300">See Also</FONT></H3>
<A HREF="../MFN/MFNGetConvergedReason.html#MFNGetConvergedReason">MFNGetConvergedReason</A>(), <A HREF="../MFN/MFNSetTolerances.html#MFNSetTolerances">MFNSetTolerances</A>()
<BR><P><B></B><H3><FONT COLOR="#883300">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#883300">Location</FONT></H3>
</B><A HREF="../../../src/mfn/interface/mfnsolve.c.html#MFNGetIterationNumber">src/mfn/interface/mfnsolve.c</A>
<P><H3><FONT COLOR="#883300">Examples</FONT></H3>
<A HREF="../../../src/mfn/tutorials/ex23.c.html">src/mfn/tutorials/ex23.c</A><BR>
<A HREF="../../../src/mfn/tutorials/ex23f.F90.html">src/mfn/tutorials/ex23f.F90</A><BR>
<A HREF="../../../src/mfn/tutorials/ex37.c.html">src/mfn/tutorials/ex37.c</A><BR>
<BR><BR><A HREF="./index.html">Index of all MFN routines</A>
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