Question

运行此代码时，我一直有错误。我想知道出了什么问题。代码必须能够读取单词和整数并重复提示（请输入一个整数＆gt; = 2：'），直到它大于或等于2.提前感谢。

def prime_number():

    prime_num = input('Please enter an integer >= 2: ')

    while not(prime_num.isdigit() and int(prime_num)<1):

        prime_num = input('Please enter an integer >= 2: ')

    for i in range(2,int(prime_num)+1):
        for x in range(2,i):
            if i%x == 0:
                break
        else:
            print (i)

Answer 1

如@rpattiso所述，您没有调用方法和
你while条件是错误的

这应该有效：

def prime_number():
    prime_num = input('Please enter an integer >= 2: ')

    while not (prime_num.isdigit() and not int(prime_num)<1):
        prime_num = input('Please enter an integer >= 2: ')

    for i in range(2,int(prime_num)+1):
        for x in range(2,i):
            if i%x == 0:
                break
        else:
            print (i)
prime_number()

Answer 2

您需要输入该功能。这通常在python中完成：

def prime_number():
    prime_num = input('Please enter an integer >= 2: ')    
    while not(prime_num.isdigit() and int(prime_num)<1):    
        prime_num = input('Please enter an integer >= 2: ')

    for i in range(2,int(prime_num)+1):
        for x in range(2,i):
            if i%x == 0:
                break
        else:
            print (i)


if __name__ == "__main__":
    prime_number()

一般的一些建议。我将输入逻辑与素数计算逻辑分开。

Python Prime数字循环

2 个答案: