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### A first program
The `main` function in toc corresponds to the `main` function in C. This function is called when your program is run. So, this is a valid toc program which does nothing:
```
main ::= fn() {
};
```
It declares a constant, `main`, which is a function with an empty body. Note that the syntax for declaring functions is the same as the syntax for declaring constants (it isn't something like `fn main() { ... }`).
Assuming you have compiled the compiler (see `README.md` for instructions about that), you can compile it with
```
toc <your filename>
```
You will get a file called `out.c`, which you can then put through your C compiler to get an executable file which does nothing. Congratulations! You've written your first toc program.
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