Added documantion and information to the programs

circle1.py

@@ -1,3 +1,12 @@
+# Program circle1.py
+
+startUpMessage = '''
+This program calculates the area of a circle. 
+
+'''
+
+print(startUpMessage)
+
 import math
 PI = math.pi
 
@@ -5,5 +14,5 @@ radius = float(input("Enter the radius of a circle "))
 
 area = PI * radius**2
 
-print(f"The area is {area}")
-
+print(f"The area is {area:.2f}")
+print("\n")