How to count the number of Vm's in an ESXi server using command line

I want to know the number of Vm's running over ESXi. What is the command for it.. ??

'vim-cmd vmsvc/getallvms'

This command list out the vm's running oover the ESXi server, but i want the number (whole number)

Please help..

Thank You,

M@rk!V