Step value and function

[israphelr at googlemail.com]

Hi there. So I have a challenge in the Python book I am using (python
programming for the absolute beginner) that tells me to improve a
function, so that it can be called with a step value, and I havn't
been able to find out yet what's meant by a step value, but i'll keep
looking of course. I'd just be grateful if someone could illimunate
this for me.

Thanks in advance.