Python Program to Generate Strong Numbers in an Interval

This python program generates Strong number in an interval given by user.

Python Source Code: Generate Strong Number

# Generate Strong numbers in interval

# function to find factorial
def fact(n):
    f = 1

    for i in range(1,n+1):
        f *= i

    return f


# function to check strong
def is_strong(n):

    if n< 0:
        return False
    
    number_copy = n
    strong_sum = 0

    while n:
        remainder = n%10
        strong_sum += fact(remainder)
        n //= 10

    return strong_sum == number_copy


# Reading interval from user
min_value = int(input('Enter minimum value: '))
max_value = int(input('Enter maximum value: '))

# Looping & displaying if it is Strong
# Here min_vale & max_value are included
print('Strong numbers from %d to %d are:' %(min_value, max_value))
for i in range(min_value, max_value+1):
    if is_strong(i):
        print(i, end=' ')

Strong Generation: Output

Enter minimum value: -10
Enter maximum value: 100000
Strong numbers from -10 to 100000 are:
0 1 2 145 40585 

Strong Generation: Code Explanation

We first read min_value and max_value from user. Function is_strong() is used to check whether a given number is Strong or not. We loop from min_value to max_value and pass each number to is_strong() function. If this function returns True, then we print it.