python动物代码⼤全,Pythonmath.factorial（）⽤法及代码⽰
例
在Python中，数学模块包含许多数学运算，可以使⽤该模块轻松执⾏。math.factorial()函数返回所需数字的阶乘。
⽤法： math.factorial(x)
参数：
x: This is a numeric expression.
返回： factorial of desired number.
代码1：
# Python code to demonstrate the working of factorial()python新手代码大全pdf
# importing "math" for mathematical operations
import math
x = 5
# returning the factorial
print ("The factorial of 5 is:", end ="")
print (math.factorial(x))
输出：
The factorial of 5 is:120
代码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))
输出：
The factorial of 5 is: 120
The factorial of 15 is: 1307674368000
The factorial of 8 is: 40320
代码3：如果x不是整数，则引发ValueError
# 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))
输出：
ValueError:factorial() only accepts integral values

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