spawn quantity command

[cthegame]

Is there an admin console command that I can use to specify the number of zombies i want to spawn, instead of just 1 at a time? The command i am currently using that works but only 1 at a time is "spawnentity <playerID> <entityID> " but is there a way to also specify the quantity?

 

The f6 option is not what im looking for, need to be able to do it via the console.

 

Thanks.