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<div class="hidden-warning"><a href="https://docs.haskellstack.org/"><img src="https://cdn.jsdelivr.net/gh/commercialhaskell/stack/doc/img/hidden-warning.svg"></a></div>
# 13. Using GHC interactively
GHCi is the interactive GHC environment, a.k.a. the REPL. You *could* access it
with command:
~~~text
stack exec ghci
~~~
But that won't load up locally written modules for access. For that, use the
`stack ghci` or `stack repl` commands, which are equivalent.
## The `stack ghci` or `stack repl` command
To then load
modules from your project in GHCi, use the `:module` command (`:m` for short)
followed by the module name.
!!! note
If you have added packages to your project please make sure to mark them as
extra-deps for faster and reliable usage of `stack ghci`. Otherwise GHCi may
have trouble due to conflicts of compilation flags or having to
unnecessarily interpret too many modules. See Stack's project-level
[configuration](../configure/yaml/project.md#extra-deps) to learn how to
configure a package as an extra-dep.
For further information, see the [REPL environment](../commands/ghci_command.md)
documentation.
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