Python中的乘法无法正常工作 [英] Multiplication in Python not working

问题描述

我在python 3.4中遇到了一个奇怪的错误，即乘法不起作用！

I have the bizarre error in python 3.4 where multiplication does not work!

这是我的代码:

timerlenth = input('Please enter the amount of minute: ')
int(timerlenth)
timersec = (timerlenth*60)
print (timersec)

以下是结果的照片:

我对解决问题几乎一无所知！

I am practically clueless on trying to solve the problem!

推荐答案

input 函数返回一个字符串.因此，变量 timerlenth 存储一个字符串.在下一行， int(timerlenth)将此变量转换为整数，但对结果不执行任何操作，将 timerlenth 保留为以前的字符串.Python具有此功能，其中 [string] * x 将重复字符串 x 次，这就是您在输出中看到的内容.

The input function returns a string. Therefore the variable timerlenth stores a string. Next line, int(timerlenth) converts this variable to integer, but does nothing with the result, leaving the timerlenth as the same string it used to be. Python has this functionality where [string]*x will repeat the string x times and that's what you see in the output.

要获得实际的乘法，您必须将 int(timerlenth)的值存储到一个变量中，最好是一个新变量(良好的编程习惯)，并将新值与乘法运算一起使用.

To get actual multiplication, you'll have to store the value of int(timerlenth) to a variable, preferably a new one (good programming practice) and use the new value with multiplication operation.

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