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<TITLE>PetscOptionsGetReal</TITLE>
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<A NAME="PetscOptionsGetReal"><H1>PetscOptionsGetReal</H1></A>
Gets the double precision value for a particular option in the database.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petsc.h"
int PetscOptionsGetReal(const char pre[],const char name[],PetscReal *dvalue,PetscTruth *flg)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>pre </B></TD><TD>- string to prepend to each name or PETSC_NULL
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>name </B></TD><TD>- the option one is seeking
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dvalue </B></TD><TD>- the double value to return
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>flg </B></TD><TD>- PETSC_TRUE if found, PETSC_FALSE if not found
</TD></TR></TABLE>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PetscOptionsGetInt.html#PetscOptionsGetInt">PetscOptionsGetInt</A>(), <A HREF="../Sys/PetscOptionsHasName.html#PetscOptionsHasName">PetscOptionsHasName</A>(),
<BR><A HREF="../Sys/PetscOptionsGetString.html#PetscOptionsGetString">PetscOptionsGetString</A>(), <A HREF="../Sys/PetscOptionsGetIntArray.html#PetscOptionsGetIntArray">PetscOptionsGetIntArray</A>(), <A HREF="../Sys/PetscOptionsGetRealArray.html#PetscOptionsGetRealArray">PetscOptionsGetRealArray</A>(),<A HREF="../Sys/PetscOptionsLogical.html#PetscOptionsLogical">PetscOptionsLogical</A>(),
<A HREF="../Sys/PetscOptionsName.html#PetscOptionsName">PetscOptionsName</A>(), <A HREF="../Sys/PetscOptionsBegin.html#PetscOptionsBegin">PetscOptionsBegin</A>(), <A HREF="../Sys/PetscOptionsEnd.html#PetscOptionsEnd">PetscOptionsEnd</A>(), <A HREF="../Sys/PetscOptionsHead.html#PetscOptionsHead">PetscOptionsHead</A>(),
<A HREF="../Sys/PetscOptionsStringArray.html#PetscOptionsStringArray">PetscOptionsStringArray</A>(),<A HREF="../Sys/PetscOptionsRealArray.html#PetscOptionsRealArray">PetscOptionsRealArray</A>(), <A HREF="../Sys/PetscOptionsScalar.html#PetscOptionsScalar">PetscOptionsScalar</A>(),
<A HREF="../Sys/PetscOptionsLogicalGroupBegin.html#PetscOptionsLogicalGroupBegin">PetscOptionsLogicalGroupBegin</A>(), <A HREF="../Sys/PetscOptionsLogicalGroup.html#PetscOptionsLogicalGroup">PetscOptionsLogicalGroup</A>(), <A HREF="../Sys/PetscOptionsLogicalGroupEnd.html#PetscOptionsLogicalGroupEnd">PetscOptionsLogicalGroupEnd</A>(),
<A HREF="../Sys/PetscOptionsList.html#PetscOptionsList">PetscOptionsList</A>(), <A HREF="../Sys/PetscOptionsEList.html#PetscOptionsEList">PetscOptionsEList</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/objects/options.c.html#PetscOptionsGetReal">src/sys/src/objects/options.c</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/sles/examples/tutorials/ex11.c.html">src/sles/examples/tutorials/ex11.c.html</A><BR>
<A HREF="../../../src/sles/examples/tutorials/ex11f.F.html">src/sles/examples/tutorials/ex11f.F.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex3.c.html">src/snes/examples/tutorials/ex3.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex5.c.html">src/snes/examples/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex5s.c.html">src/snes/examples/tutorials/ex5s.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex14.c.html">src/snes/examples/tutorials/ex14.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex18.c.html">src/snes/examples/tutorials/ex18.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex19.c.html">src/snes/examples/tutorials/ex19.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex20.c.html">src/snes/examples/tutorials/ex20.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex26.c.html">src/snes/examples/tutorials/ex26.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex5f.F.html">src/snes/examples/tutorials/ex5f.F.html</A><BR>
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