|   | 
Change current working directory to that specified by argument.
| Number | Type | Compulsory | Default | Description | 
|---|---|---|---|---|
| 1 | string | Yes | 
 | New directory | 
Return type: real
Return value is a code indicating the success of the function:
| Code | Meaning | 
|---|---|
| 0 | Success | 
| 1 | Cannot create directory | 
| 2 | Invalid disk (windows) | 
| 
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