:orphan:
# PetscMalloc1
Allocates an array of memory aligned to `PETSC_MEMALIGN` 
## Synopsis
```
#include <petscsys.h>
PetscErrorCode PetscMalloc1(size_t m1,type **r1)
```
Not Collective


## Input Parameter

- ***m1 -*** number of elements to allocate  (may be zero)



## Output Parameter

- ***r1 -*** memory allocated





## Note
This uses the sizeof() of the memory type requested to determine the total memory to be allocated, therefore you should not
multiply the number of elements requested by the `sizeof()` the type. For example use
```none
  PetscInt *id;
  PetscMalloc1(10,&id);
```

not
```none
  PetscInt *id;
  PetscMalloc1(10*sizeof(PetscInt),&id);
```


Does not zero the memory allocated, use `PetscCalloc1()` to obtain memory that has been zeroed.


## See Also
 `PetscFree()`, `PetscNew()`, `PetscMalloc()`, `PetscCalloc1()`, `PetscMalloc2()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscsys.h.html#PetscMalloc1">include/petscsys.h</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/field/tutorials/ex1.c.html">src/dm/field/tutorials/ex1.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/ex10.c.html">src/dm/impls/plex/tutorials/ex10.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/ex6.c.html">src/dm/impls/plex/tutorials/ex6.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex4.c.html">src/dm/impls/stag/tutorials/ex4.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/ex20.c.html">src/dm/tutorials/ex20.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/ex26.c.html">src/dm/tutorials/ex26.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/ex6.c.html">src/dm/tutorials/ex6.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/swarm_ex1.c.html">src/dm/tutorials/swarm_ex1.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/swarm_ex3.c.html">src/dm/tutorials/swarm_ex3.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex13.c.html">src/ksp/ksp/tutorials/ex13.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex21.c.html">src/ksp/ksp/tutorials/ex21.c</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/include/petscsys.h)


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