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# PR_Init
Initializes the runtime.
## Syntax
```{code}
#include <prinit.h>
void PR_Init(
PRThreadType type,
PRThreadPriority priority,
PRUintn maxPTDs);
```
### Parameters
{ref}`PR_Init` has the following parameters:
`type`
: This parameter is ignored.
`priority`
: This parameter is ignored.
`maxPTDs`
: This parameter is ignored.
## Description
NSPR is now implicitly initialized, usually by the first NSPR function
called by a program. {ref}`PR_Init` is necessary only if a program has
specific initialization-sequencing requirements.
Call {ref}`PR_Init` as follows:
```{code}
PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
```