Is zero a cardinal number?

Hi there. I was having a real problem finding out is zero was a cardinal number or not?
This website says it is...

https://www.yourdictionary.com/cardinal-number

and this website says it is not?

https://byjus.com/maths/cardinal-numbers/

In fact the issue seems to be very unclear.

Zero is not in the ordinal set as there is no ZEROth step. Is that right?

I want to know is I am standing at zero, and a Take a step, Do I count the zero number, and is this a cardinal number?

I apologise if this seems like a very simple maths question. Thanks in advance for your help..

 

The cardinal number of the empty set is is 0.