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Moved all docs from ./docs/ to ./web/documentation/ to be available on the website. No code changes. (0.40.5)

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Johannes Findeisen 2026-04-10 23:27:55 +02:00
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# Fun CLI
Reference for the `fun` command-line interface.
For a complete usage guide (including REPL details, environment variables, include paths, examples, and install locations), see [fun.md](./fun.md).
## Synopsis
```
fun [options] <script.fun> [-- args...]
```
If no script is supplied and interactive mode is available, `fun` starts a REPL (see [repl.md](./repl.md)).
## Common options
- `-i`, `--repl` - start an interactive REPL
- `-v`, `--version` - print version and exit
- `-h`, `--help` - show help and exit
Options may vary between versions; run `fun --help` to see what your build supports.
## Exit codes
- `0` - success
- non-zero - error during parse, compile, or runtime
## Includes and library paths
- `FUN_LIB_DIR` - environment variable that points to the stdlib location; when running from the repo, set this to `./lib`.
- `DEFAULT_LIB_DIR` - compiled-in fallback path determined at build/install time.
See also: [includes.md](./includes.md) for namespaced includes and search order.
## Examples
Run a script:
```
FUN_LIB_DIR=./lib ./build/fun examples/hello.fun
```
Start the REPL:
```
./build/fun -i
```