python 循环定义变量,为什么我不必使用range（）在for循环中定义变量，但是在Python中必须在while循环中定义变量？...
I have the following code using a for loop:total = 0for num in range(101):total = total + numprint(total)Now the same result using a while loop:num = 0total = 0while num <= 99:num = num + 1total = ...
