How to indicate that there are no zeros for a transfer function for the command zpk?

I have the transfer function H(s) = 1/s^3. I would like to use the command ZPK to yeild the zeros, poles, and gain of the function. However, what can I put in place of zeros to indicate that there are no zeros for this function?

Answer 1

[Birdman]

zpk([],[0 0 0],1)

You basically leave zero input section empty as above.

[Batool Khader]

Thanks a lot!