Python | sympy.subfactorial() method
With the help of sympy.subfactorial() method, we can find the Subfactorial of a number in SymPy. Subfactorial of a number is given by –
Syntax: subfactorial(n)
Parameter:
n – It denotes the number whose subfactorial is to be calculated.Returns: Returns the subfactorial of number, i. e., n.
Example #1:
# import sympy from sympy import * n = 4print("Value of n = {}".format(n)) # Use sympy.subfactorial() method subfactorial_n = subfactorial(n) print("Subfactorial of n : {}".format(subfactorial_n)) |
Output:
Value of n = 4 Subfactorial of n : 9
Example #2:
# import sympy from sympy import * n = 9print("Value of n = {}".format(n)) # Use sympy.subfactorial() method subfactorial_n = subfactorial(n) print("Subfactorial of n : {}".format(subfactorial_n)) |
Output:
Value of n = 9 Subfactorial of n : 133496
