# Preprocessors

## #Include

Includes other source file into current source file at the line immediately after the directive.

if an include folder is specified when compiling the **C--** using the -i flag, the file located in the previous folder can be *include* without adding the entire path.

Circular dependencies are forbidden so you can not include a file that include the current one.

### Synopsis

```
(#include <filename>)
```

### Examples

```
(#include ./lib.cmm)
(func (test (int c))
{
    (c);
})
(test 2)
```

We can see that we include the file **lib.cmm** this file contains the function **factorial** which is use in the function **test.**

If we had not include the file **lib.cmm**, the previous code would not run.