En Python, el módulo de matemáticas contiene una serie de operaciones matemáticas, que se pueden realizar con facilidad usando el módulo. math.factorial()La función devuelve el factorial del número deseado.
Syntax: math.factorial(x) Parameter: x: This is a numeric expression. Returns: factorial of desired number.
Código #1:
# Python code to demonstrate the working of factorial()
# importing "math" for mathematical operations
import math
x = 5
# returning the factorial
print ("The factorial of 5 is : ", end ="")
print (math.factorial(x))
Producción:
The factorial of 5 is : 120
Código #2:
# Python code to demonstrate the working of factorial()
# importing "math" for mathematical operations
import math
x = 5
y = 15
z = 8
# returning the factorial
print ("The factorial of 5 is : ", math.factorial(x))
print ("The factorial of 15 is : ", math.factorial(y))
print ("The factorial of 8 is : ", math.factorial(z))
Producción:
The factorial of 5 is : 120 The factorial of 15 is : 1307674368000 The factorial of 8 is : 40320
Código #3: arroja ValueError si x no es un número entero
# Python code to demonstrate the working of factorial()
# importing "math" for mathematical operations
import math
# when x is not integer
print ("math.factorial(13.7) : ", math.factorial(13.7))
Producción:
ValueError: factorial() only accepts integral values