#python program to calculate area of a circle

#getting radius of circle as input from user

radius=input("Enter radius of circle: ")

try:

    radius=float(radius)

    #calculate area of circle

    area = 22/7 * (radius**2)

    #print area of circle

    print("---output---")

    print("area of circle with radius %0.2f is %0.2f"%(radius,area))

except:

    print("please enter a valid radius")

Enter radius of circle: 14

---output---

area of circle with radius 14.00 is 616.00

 

Enter radius of circle: circle

please enter a valid radius