HW
1
def f(a, b):
    return 18 * a * b

print(f(1, 1))
Answer: 2

2
summa = 0
for i in range(1, 11):
    summa += i
print("The sum is: ", summa)
Answer: 3

3
def is_even(n):
    if n % 2 == 0:
        print (n, " is even")
    else:
        print (n, " is odd")
is_even('4')
Answer: 4

4
def factorial(n):
    if n < 0:
        return None
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

n = int(input())
print(factorial(n))

5
def is_palindrome(s):
    s = s.lower()
    for i in range(len(s)):
        if s[i] != s[len(s) - 1-i]:
            return False
    return True

s = '12321'
print(is_palindrome(s))

6
def multiplylist(lst):
    if len(lst) == 0:
        return None
    else:
        result = 1
        for i in lst:
            result = result * i
        return result

lst = [6, 7, 2]

print(multiplylist(lst))