Star prefix to variable names. What and why?

[MansfieldMan]

Hi. This is probably so obvious to everyone but me.

What is the relevance of prefixing variable names with a star (*)
What does it mean?
When do you use it and not use it?
Why do you use it?

Please enlighten me.

Regards
MansfieldMan

[hiqu]

They are pointer variables. Learn more about pointers
here Everything you need to know about pointers in C or just search google for
C pointers