while 循环输出的值不正确

Question

这是我的代码，为什么输出的是0而不是输入的值？

cube = 0
value = int(input("Enter a value to be cubed or 0 to quit: "))

while value != 0:
    cube = value **3
    value = int(input("Enter a value to be cubed or 0 to quit: "))

print (value, "cubed is", cube)

Answer 1

您要做的第一件事是缩进 print，以便它引用循环内的值：

cube = 0
value = int(input("Enter a value to be cubed or 0 to quit: "))

while value != 0:
    cube = value **3
    value = int(input("Enter a value to be cubed or 0 to quit: "))
    print (value, "cubed is", cube)

但是现在每次打印结果时，cube指的是上一轮。所以你想改变顺序：

# no need to do cube = 0, it contributes nothing
value = int(input("Enter a value to be cubed or 0 to quit: "))

while value != 0:
    cube = value**3
    print (value, "cubed is", cube)
    value = int(input("Enter a value to be cubed or 0 to quit: "))

while 循环输出的值不正确

incorrect value outputting from while loop

python

output