Added documentation 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")

rectangle01.py

@@ -1,7 +1,16 @@
+# Program rectangle01.py
+
+startUpMessage = '''
+This program calculates the area of a rectangle. 
+
+'''
+
+print(startUpMessage)
 
 length = float(input("Enter a value for the length "))
 width =  float(input("Enter a value for the width  "))
 
 areaOfRectangle = length * width
 
-print(f"Area = {areaOfRectangle:.1f}")
+print(f"Area = {areaOfRectangle:.1f}")
+print("\n")

rectangular-solid01.py

@@ -1,3 +1,11 @@
+# Program rectanglar-solid.py
+
+startUpMessage = '''
+This program calculates the volume of a rectangular solid. 
+
+'''
+
+print(startUpMessage)
 
 length = float(input("Enter a value for the length "))
 width =  float(input("Enter a value for the width  "))
@@ -5,4 +13,5 @@ height = float(input("Enter a value for the height "))
 
 volumeOfRectangle = length * width * height
 
-print(f"Volume = {volumeOfRectangle:.1f}")
+print(f"Volume = {volumeOfRectangle:.1f}")
+print("\n")

sphere1.py

@@ -1,3 +1,12 @@
+# Program sphere1.py
+
+startUpMessage = '''
+This program calculates the volume of a sphere. 
+
+'''
+
+print(startUpMessage)
+
 
 import math
 PI = math.pi
@@ -7,4 +16,4 @@ radius = float(input("Enter the radius of a sphere "))
 
 volume = 4 / 3 * PI  * radius**3
 
-print(f"The volume of the sphere is {volume}")
+print(f"The volume of the sphere is {volume:.2f}")