# QUESTION 1

def circle_area(radius):

return 3.14*radius**2

r = int(input('Enter a radius: '))

print('Area is: ', circle_area(r))

# QUESTION 2

def perfect(num):

s = 0

for i in range(1, num):

if num % i == 0:

s += i

if s == num:

print('It is a Perfect Number')

else:

print('It is NOT a Perfect Number')

print('Following are the perfect numbers from 1-1000: ')

i = 1

while i <= 1000:

s = 0

for j in range(1, i):

if i % j == 0:

s += j

if s == i:

print(i, end=" ")

i += 1

n = input('Enter a number: ')

perfect(n)

# QUESTION 3

def table(x):

if x == 11:

print('Table Over!')

else:

print('12 * ', x, ' = ', 12*x )

table(x+1)

# QUESTION 4

p = 1

def power(x, y):

"""

The function finds x^y using recursion

:param x: the base

:param y: the power

:return: p = the final answer

"""

global p

if y == 0:

return p

else:

p *= x

y -= 1

return power(x, y)

x = int(input('Enter the base number x: '))

y = int(input('Enter the power y: '))

print('x^y = ', power(x, y))

# QUESTION 5

def factorial(x):

global p

dic = {}

if x == 1:

dic[x] = p

return p

else:

p *= x

return factorial(x-1)