PYTHON - LOOPS 8

1) Double Number

no = int(input('Enter a Number: '))
if no > 9 and no < 100:
    print ( f'{no} is double Number')

OUTPUT:
Enter a Number: 54
54 is double Number
2) Neon Number
A neon number is a number where the sum of the digits of its square is equal to the number itself.
For example, 9 is a neon number because 9² = 81 and the sum of its digits is 8 + 1 = 9.

def sum (n):
    total = 0
    while n > 0:
        total = total + n%10
        n//=10
    return total
no = int(input('Enter a Number: '))
square = no**2
result = sum(square)
if no == result :
    print ('Neon Number')
else:
    print ('Not a Neon Number')

OUTPUT:
Enter a Number: 9
Neon Number
3)Strong Number
A strong number is a positive number where the sum of the factorials of its digits equals the number itself. For example, 145 is a strong number because 1! + 4! + 5! = 1 + 24 + 120 = 145.

def fact(n):
    if n == 1:
        return 1
    else:
        return n*fact(n-1)
def sum (n):
    total = 0
    while n >0:
        total = total + fact(n%10)
        n//=10
    return total
no = int(input('Enter a Number: '))
result = sum(no)
if no == result :
    print ('Strong Number')
else:
    print('Not a Strong Number')

OUTPUT:
Enter a Number: 145
Strong Number
4) Automorphic Number
An automorphic number is an integer whose square ends with the exact same digits as the number itself.
For example, 5² = 25 ends in 5, and 76² = 5776 ends in 76.

def count_of_digits (n):
    count = 1
    while n > 0:
        count *= 10
        n//=10
    return count
no = int(input('Enter a Number: '))
square = no ** 2
count = count_of_digits(no)
if (no == square%count):
    print('Automorphic number')
else:
    print('Not an Automorphic number')

OUTPUT:
Enter a Number: 25
Automorphic number
5) Duck Number
A duck number is a positive number that contains at least one zero digit, provided the zero does not appear at the very beginning of the number.

no = input('Enter a Number: ')
if no[0] == '0' or '0' not in no:
    print('Not a Duck number')
else:
    if '0' in no :
        print('Duck Number')

OUTPUT:
Enter a Number: 125063
Duck Number
6) Spy Number
A spy number is a positive integer where the sum of its digits equals the product of its digits. For example, 1124 is a spy number because (1 + 1 + 2 + 4 = 8) and (1 \times 1 \times 2 \times 4 = 8).

def sum (n):
    total = 0
    multiply = 1
    while n >0:
        total = total + n%10
        multiply *= n%10
        n//=10
    return total == multiply
no = int(input('Enter a Number: '))
result = sum(no)
if result:
    print('Spy Number')
else:
    print('Not a Spy Number')

OUTPUT:
Enter a Number: 1124
Spy Number