为什么while循环在另一个循环内不起作用（在范围内）

Question

我想使用while（数字从0到1000000）运行一个函数（def）100次

但是while并不会在需要时中断循环。 我该如何解决？

count = 2  #I start from 2 on purpose
limit = 101

def is_prime(i):
    global count
    count+=1
    #there is more to the function is_prime but it isn't relevant 
    #i made a function with input to show a example

while (count < limit):
    for i in range(1000000):
        is_prime(i)
        print ("count = ", count)

我希望它在count = 100时停止运行

Answer 1

尝试执行此操作-为了与子例程内部的全局变量进行交互-您需要指示其为全局变量。否则，它就是与现有全局变量同名的局部函数变量

count = 2  #I start from 2 on purpose
limit = 101

def is_prime(i):
    global count
    count+=1
    #there is more to the function is_prime but it isn't relevant 
    #i made a function with input to show a example

while (count < limit):
    for i in range(1000000):
        is_prime(i)
        print ("count = ", count)
print(count)