PYHTON TASK 7

TASK
1. NEON NUMBER:

A neon number is a number where the sum of the digits of its square is equal to the number itself

eg:
9^2=>81
8+1=>9 (neon number)

12^2=>144
1+4+4=>9 (not a neon number)

def sum_of_digit(no):
    sum=0
    a=0
    while no>0:
        a=no%10
        sum=sum+a
        no=no//10
    return sum

no=int(input("enter a number"))
sq=no**2
result=sum_of_digit(sq)
if no==result:
    print(f'{no} this is neon number')
else:
    print(f' {no} this is not a neon number')

output:

enter a number9
9 this is neon number

2. Strong number:

A Strong number is a number equal to the sum of the factorials of its digits and its equal to the number itself

eg: number = 145
1!+4!+5!
1+24+120=145

def fact(no):
    facto=1
    while no>0:
        facto=facto*no
        no=no-1
    return facto

def sum_digit(no):
    sum=0
    a=0
    while no>0:
        a=no%10
        factorial=fact(a)
        sum=sum+factorial
        no=no//10
    return sum

no=int(input("enter a number:"))
result= sum_digit(no)
if result==no:
    print(f'{result} is a strong number')
else:
    print(f'{result} is not a strong number')

output:

enter a number:145
145 is a strong number

enter a number:123
9 is not a strong number

3. Duck number

A number should not start with 0 and a number atleast contain a one 0

no=input("enter a number")
if no[0]=='0':
    print(f'{no} is not a duck number')
else:
    print(f'{no} is a duck nunber')

output:

enter a number0134
0134 is not a duck number

enter a number10234
10234 is a duck nunber

4. Spy number:

A Spy Number is a number where the sum of its digits equals the product of its digits.

def sum_of_digit(no):
    sum=0
    a=0
    while no>0:
        a=no%10
        sum=sum+a
        no=no//10
    return sum
def mul_of_digit(no):
    mul=1
    a=0
    while no>0:
        a=no%10
        mul=mul*a
        no=no//10
    return mul    

no=int(input("enter a number: "))
sum=sum_of_digit(no)
mul=mul_of_digit(no)
if sum==mul:
    print(f'{sum} and {mul} are spy number')
else:
    print(f'{sum} and {mul} are not spy number')

output:

enter a number: 123
6 and 6 are spy number

enter a number: 456
15 and 120 are not spy number