radius = int(input("Enter radius: \n"))
if radius >= 0:
    print("Circumference = ", 2 * 3.14 * radius)
    print("Area = ", 3.14 * radius ** 2 )
else:
    print("Please enter a positive number")

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radius = int(input("Enter radius: \n"))

if radius >= 0:

    print("Circumference = ", 2 * 3.14 * radius)

    print("Area = ", 3.14 * radius ** 2 )

else:

    print("Please enter a positive number")