# Python program to print all Strong numbers in given list

• Last Updated : 25 Jun, 2019

Given a list, write a Python program to print all the strong numbers in that list.

Strong Numbers are the numbers whose sum of factorial of digits is equal to the original number.

Example for checking if number is Strong Number or not.

```Input: n = 145
Output: Yes
Explanation:
Sum of digit factorials = 1! + 4! + 5!
= 1 + 24 + 120
= 145
```

Steps for checking number is strong or not :

```1) Initialize sum of factorials as 0.
2) For every digit d, do following
a) Add d! to sum of factorials.
3) If sum factorials is same as given
number, return true.
4) Else return false.
```

Let’s see the Python program for this problem :

 `# Python3 program to print ``# all strong numbers in a list. `` ` `# Define a function for calculating``# factorial of a number``def` `factorial(number):`` ` `    ``fact ``=` `1``     ` `    ``if` `number ``=``=` `0` `or` `number ``=``=` `1` `:``        ``return` `fact``     ` `    ``for` `i ``in` `range``(``2``, number ``+` `1``) :``        ``fact ``*``=` `i``     ` `    ``return` `fact``         ` `# Define a function for checking a ``# number is strong number or not``def` `find_strong_numbers(num_list):``    ``result ``=` `[]``     ` `    ``# loop till list is not empty``    ``for` `num ``in` `num_list :``        ``sum` `=` `0``        ``temp ``=` `num``         ` `        ``# loop till number is not zero``        ``while` `num !``=` `0` `:``             ` `            ``r ``=` `num ``%` `10``             ` `            ``# function call``            ``sum` `+``=` `factorial(r)``             ` `            ``num ``/``/``=` `10``         ` `        ``# check number is strong or not``        ``if` `sum` `=``=` `temp:``             ` `            ``# adding number to the list``            ``result.append(temp)``          ` `    ``# return list of strong numbers   ``    ``return` `result``             ` ` ` `# Driver Code``if` `__name__ ``=``=` `"__main__"` `:``     ` `    ``num_list ``=` `[``145``, ``375``, ``100``, ``2``, ``10``, ``40585``, ``0``]``     ` `    ``# function call``    ``strong_num_list ``=` `find_strong_numbers(num_list)``     ` `    ``# loop till list is not empty``    ``for` `strong_num ``in` `strong_num_list :``        ``print``(strong_num, end ``=``" "``)``       `

Output:

```145 2 40585 0
```

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