PETSc version 3.17.0
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# PetscRandomSetSeed

Sets the random seed. You MUST call PetscRandomSeed() after this call to have the new seed used.

### Synopsis

    #include "petscsys.h"
    PetscErrorCode  PetscRandomSetSeed(PetscRandom r,unsigned long seed)

Not collective

### Input Parameters

| r | - The random number generator context
| seed | - The random seed

### Usage

PetscRandomSetSeed(r,a positive integer); PetscRandomSeed(r); PetscRandomGetValue() will now start with the new seed.

PetscRandomSeed(r) without a call to PetscRandomSetSeed() re-initializes the seed. The random numbers generated will be the same as before.

### See Also

PetscRandomCreate(), PetscRandomGetSeed(), PetscRandomSeed()

### Level

intermediate

### Location

src/sys/classes/random/interface/randomc.c

### Examples

src/ksp/ksp/tutorials/ex70.c.html
src/snes/tutorials/ex12.c.html
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