I have seen this in some scripts but I don't get what its for Can you help me?
math.pi is basicly pi. If you've done circumference in math class yet its used in that. math.pi is a shorter way of writing 3.14159265359 (Goes on for at least 100 more numbers).
Just an pre-algebra abbreviation (A way of shortening things, ex: BRB)
Just easier than writing out pi by hand.