Question

我试图打印出bool结构范围内的素数。

def get_boundries_from_user():
    upper_boundary = input("Enter upper boundary please:\n")
    lower_boundary = input("Enter lower boundary please:\n")
    return upper_boundry,lower_boundary

def print_prime_numbers():
    upper_boundry,lower_boundry = get_boundries_from_user()
    upper_boundry += 1
    if (lower_boundary<0 or upper_boundary<0):
        print "Negative values cannot be prime numbers"
        return
    for i in range(lower_boundary,upper_boundary):
        prime = True
        for k in range(2,i):
            if (i%k==0):
                prime = False
                if prime:
                    print i

print_prime_numbers()

我错在哪里？你能解释一下你的答案的逻辑吗？

Answer 1

def get_boundries_from_user():
    upper_boundary = input("Enter upper boundary please:\n")
    lower_boundary = input("Enter lower boundary please:\n")
    return upper_boundary,lower_boundary

def print_prime_numbers():
    upper_boundry,lower_boundry = get_boundries_from_user()
    if (lower_boundry<0 or upper_boundry<0):
        print "Negative values cannot be prime numbers"
        return
    print "\nPrimes"
    for i in range(lower_boundry,upper_boundry+1):
        prime = True
        for k in range(2,i):
            if (i%k==0):
                prime = False
        if prime:
            print i

print_prime_numbers()

这是工作代码。请注意，您必须先输入上边界，然后输入下边界。因此，例如UB-20和LB-10将为您提供输出素数 11 13 17 19

在边界内打印素数

1 个答案: