Python While 循环教程 #Day3

# Armstrong Number

def Armstrong(Num):
    num_str = str(Num)
    num_digits = len(num_str)
    sum_of_powers = 0
    for digit in num_str:
        sum_of_powers += int(digit) ** num_digits
    return sum_of_powers == Num

# Example usage
number = 153
if Armstrong(number):
    print(f"{number} is an Armstrong number")
else:
    print(f"{number} is not an Armstrong number")


# Neon Number

Num = int(input("Enter the number: "))
Square = Num * Num
Sum = 0
while Square > 0:
    Sum += Square % 10
    Square //= 10
if Sum == Num:
    print(f"{Num} is a Neon Number")
else:
    print(f"{Num} is not a Neon Number")


# Factorial of a Number

Num = int(input('Enter the number: '))
Fact = 1
i = 1
while i <= Num:
    Fact *= i
    i += 1
print('Factorial:', Fact)


# Perfect Number

Num = int(input('Enter the number: '))
i = 1
sum = 0
while i < Num:
    if Num % i == 0:
        sum += i
    i += 1
if sum == Num:
    print(f"{Num} is a Perfect Number")
else:
    print(f"{Num} is not a Perfect Number")


# Prime Number

def isPrimeNumber(Num):
    if Num <= 1:
        return 0
    i = 2
    while i * i <= Num:
        if Num % i == 0:
            return 0
        i += 1
    return 1


# Example usage:
num = int(input("Enter a number to check if it's prime: "))
if isPrimeNumber(num):
    print(f"{num} is a prime number")
else:
    print(f"{num} is not a prime number")


# Emirp Number

def isEmirp(Num):
    if not isPrimeNumber(Num):
        return False
    rev_num = int(str(Num)[::-1])
    return isPrimeNumber(rev_num) and rev_num != Num

# Example usage
num = int(input("Enter a number to check if it's an emirp number: "))
if isEmirp(num):
    print(f"{num} is an Emirp number")
else:
    print(f"{num} is not an Emirp number")