# Runtime Parameters

This page briefly describes parameters that may be defined in the input file. All parameters are case sensitive. Required parameters for all setups are listed first, followed by parameters required for specific Makefile flags or initial conditions. A sample parameter file can be found in the examples directory.

:::{todo}
Port me [from the wiki](https://github.com/cholla-hydro/cholla/wiki/Input-File-Parameters)
:::

## Required Parameters

These parameters are required for all simulations

:::{include} param/Required.md
:::

## Chemistry

These parameters should all be specified in the `[chemistry]` parameter table.

:::{include} param/Chemistry.md
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