print('calculate area of a circle')
def circle():
    radius = input('enter radius')
    radius = float(radius)
    area = 3.14*radius*radius
    print ('area is ')
    print (area)
    

circle()

print('calculate area of a circle')
def circle():
    radius = input('enter radius')
    radius = float(radius)
    area = 3.14*radius*radius
    print ('area is ')
    print (area)
    

circle()
