python - 如何找到 while 循环执行了多少次？

Question

演示了 while 循环的示例程序:

answer="0"
while answer!="4":
    answer=input("What is 2 + 2?")
    if answer!="4":
        print("Wrong...Try again.")
    else:
        print("Yes! 2 + 2 = 4")

这里循环将执行到用户给出正确答案，即 4。

我想在上面的代码中添加另一个功能，打印用户尝试给出正确答案的次数。

print("You gave correct answer in attempt",answer)

但我不知道该怎么做。

Answer 1

创建一个变量来存储用户尝试的次数:

attempts = 0 

while True:
    answer = int(raw_input("What is 2 + 2?"))
    attempts += 1
    if answer == 4: 
        print("Yes! 2 + 2 = 4")
        break
    print "Wrong.. try again"

print "It took {0} amount of attempts".format(attempts)