def main():
# Create a circle with radius 1
circle1 = Circle()
print("The area of the circle of radius", circle.radius, "is",
circle1.getArea())
# Create a circle wirh radius 25
circle2 = Circle(25)
print("The area of the circle of radius", circle2.radius, "is",
circle2.gerArea())
# Create a circle with radius 125
circle3 = Circle(125)
print("The area of the circle of radius", circle3.radius, "is",
circle3.getArea())
# Modify circle radius
circle2.radius = 100 # or circle2.setRadius(100)
print("The area of the circle of radius", circle2.radius, "is",
circle2.getArea())
