(NPOTENTIAL-target)=
# NPOTENTIAL
```{tags} Quantum Mechanics
```

Send the number of potential grid points.



## >NPOTENTIAL

Send number of potential grid points

**Datatype:** `MDI_INT`  
**Quantity**: `1`  

 The driver sends the number of grid points it is using to represent a potential on a grid.  This command is intended to be used in conjuction with the [>CPOTENTIAL](CPOTENTIAL) and [>POTENTIAL](POTENTIAL) commands;  these three commands enable a driver to set an external potential that is incorporated into a subsequent scf_command command.  See the [>POTENTIAL](POTENTIAL) command for more details.


### Examples


::::{tab-set}

:::{tab-item} Python
:sync: python

```python
import mdi

# connect to the engine
mdi_engine = mdi.MDI_Accept_Communicator()

# set the number of potential points
npotential = 10

# send the number of potential grid points to the engine
mdi.MDI_Send_Command(">NPOTENTIAL", mdi_engine)
mdi.MDI_Send(npotential, 1, mdi.MDI_INT, mdi_engine)

```
:::

:::{tab-item} C++
:sync: cpp

```cpp
#include "mdi.h"

// connect to the engine
MDI_Comm mdi_engine = MDI_Accept_Communicator();

// create a variable for the number of potential grid points
int npotential = 10

// send the number of potential grid points to the engine
MDI_Send_Command(">NPOTENTIAL", mdi_engine);
MDI_Send(&npotential, 1, MDI_INT, mdi_engine);

```
:::

::::