A name is like "Radius" but a value is what that

that equals

Its useful because if im ever doing something with circles or math i now have an easy way to make the circle
and radius of the circle

circle_area.py

@@ -1,6 +1,9 @@
+
 # circle_area.py
 # --------------
 # By MWC Contributors
-
+from math import pi
 print("This program will calculate the area of a circle.")
 radius = float(input("What is the circle's radius? "))
+area = pi*radius*2
+print(round (area,2))