# dihedral_style zero command

## Syntax

``` LAMMPS
dihedral_style zero keyword
```

-   zero or more keywords may be appended
-   keyword = *nocoeff*

## Examples

``` LAMMPS
dihedral_style zero
dihedral_style zero nocoeff
dihedral_coeff *
```

## Description

Using a dihedral style of zero means dihedral forces and energies are
not computed, but the geometry of dihedral quadruplets is still
accessible to other commands.

As an example, the [compute dihedral/local](compute_dihedral_local)
command can be used to compute the theta values for the list of
quadruplets of dihedral atoms listed in the data file read by the
[read_data](read_data) command. If no dihedral style is defined, this
command cannot be used.

The optional *nocoeff* flag allows to read data files with a
DihedralCoeff section for any dihedral style. Similarly, any
dihedral_coeff commands will only be checked for the dihedral type
number and the rest ignored.

Note that the [dihedral_coeff](dihedral_coeff) command must be used for
all dihedral types, though no additional values are specified.

## Restrictions

> none

## Related commands

none

[dihedral_style none](dihedral_none)

## Default

none