0 non-existent, none -- zéro [ masculine ]
He decided the chances of them being caught were nil. Il décida que les chances de se faire attrapper étaient nulles.
1 indicates zero, in sports scores -- zéro [ masculine ]
The score was one nil. Le score était de un à zéro.
2 (in scoring) nothing; zero -- zéro
Leeds United won two-nil / by two goals to nil.