yes there are five players on a court at once in basketball
They play basketball in a basketball court for your information.
5 players per team play on the court in ALL basketball.
Five players take the court for each team when they take the court in basketball.
There are five players on the court from each team at the start of a basketball game.
While 18 basketball players can fit on a court, only 5 players from each team are allowed on a court at one time, meaning 10 players are on the court at any given moment.
In a normally game of basketball there are 5 players on the court from each team equally to 10 altogether.