内部循环与外部循环的变量值

Question

我很好奇为什么下面的语法块会根据代码中“ans”的位置对变量“ans”进行不同的处理。在第一个例子中，“ans”根据用户输入正确递增/递减。在第二个中，尽管用户输入，“ans”仍保持等于原始值（在这种情况下为50）。变量“低”和“高”在循环之外但仍然保存循环中的值，而“ans”在循环之外而不是。感谢帮助。

1

low = 0
high = 100

print("Please think of a number between 0 and 100!")
while True:
    ans = int((high + low)/2)
    print("Is your secret number", str(ans), "?")
    x = input("Enter h if too high, l if too low, or c if correct: ")
    if x == "l":
        low = ans
    elif x == "h":
        high = ans
    elif x == "c":
        print("Game over. Your secret number was: ", ans)
        break
    else:
        print("Sorry I did not understand your input.")
        x = input("Enter h if too high, l if too low, or c if correct: ")

2

low = 0
high = 100
ans = int((high + low)/2)

print("Please think of a number between 0 and 100!")
while True:
    print("Is your secret number", str(ans), "?")
    x = input("Enter h if too high, l if too low, or c if correct: ")
    if x == "l":
        low = ans
    elif x == "h":
        high = ans
    elif x == "c":
        print("Game over. Your secret number was: ", ans)
        break
    else:
        print("Sorry I did not understand your input.")
        x = input("Enter h if too high, l if too low, or c if correct: ")