--> Testing ..9:
int(0)
float(0)
bool(false)

--> Testing .9.:
int(0)
float(0.9)
bool(true)

--> Testing 9..:
int(9)
float(9)
bool(true)

--> Testing 9.9.:
int(9)
float(9.9)
bool(true)

--> Testing 9.9.9:
int(9)
float(9.9)
bool(true)