petsc-3.7.3 2016-07-24
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# PetscOptionsValidKey

PETSc Options database keys must begin with one or two dashes (-) followed by a letter.

### Synopsis

    #include "petscsys.h"
    PetscErrorCode  PetscOptionsValidKey(const char in_str[],PetscBool  *key)

### Input Parameter

in_str -string to check if valid

### Output Parameter

key -PETSC_TRUE if a valid key

Level:intermediate
Location: src/sys/objects/options.c
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