Question

例如，当我输入2 * 100时，我得到： 5555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555555

这是为什么？这是我的代码

import math
KeepProgramRunning = True
while KeepProgramRunning:
    print 'Please enter the centimetre value you wish to convert to millimetres '
    a = raw_input()
    print 'The answer is',

Answer 1

那是因为raw_input()返回一个字符串

使用int()将该字符串转换为整数：

a = int(raw_input())

示例：

>>> x = raw_input()
2
>>> x * 5
'22222'
>>> x = int(raw_input())
2
>>> x * 5
10

Answer 2

因为输入检索字符串，请按以下步骤操作：

import math
KeepProgramRunning = True
while KeepProgramRunning:
    print 'Please enter the centimetre value you wish to convert to millimetres '
    a = int(raw_input())
    print 'The answer is',

当我要求Python将数字乘以100时，它会将数字打印100次？

2 个答案: