Python| sympy.primorial() 方法

在sympy.primorial()方法的帮助下，我们可以找到前n 个素数（默认）或小于或等于n的素数（当nth=False时）的乘积，其中n和nth是该方法的参数。

Syntax: primorial(n, nth)

Parameter:
n – It denotes the number for which the product of first n primes or prime less than or equal to n is calculated.
nth – It denotes a boolean value. When True, it returns the product of first n primes whereas when False returns the product of primes less than or equal to n.

Returns: Returns the product of the first n primes or the primes less than or equal to n .

示例 #1：

# import primorial() method from sympy
from sympy import primorial
  
n = 3
  
# Use primorial() method 
primorial_n = primorial(n) # 2 * 3 * 5
      
print("The product of first {} primes is {}".format(n, primorial_n))

输出：

The product of first 3 primes is 30

示例 #2：

# import primorial() method from sympy
from sympy import primorial
  
n = 10
  
# Use primorial() method 
primorial_n = primorial(n, nth = False) # 2 * 3 * 5 * 7
      
print("The product of primes less than or equal to {} is {}".format(n, primorial_n))          

输出：

The product of primes less than or equal to 10 is 210