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# PR_Initialized
Checks whether the runtime has been initialized.
## Syntax
```{code}
#include <prinit.h>
PRBool PR_Initialized(void);
```
### Returns
The function returns one of the following values:
- If {ref}`PR_Init` has already been called, `PR_TRUE`.
- If {ref}`PR_Init` has not already been called, `PR_FALSE`.