Help restricting non whole numbers in a script

Question

John Furman 2020-1-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/502648-help-restricting-non-whole-numbers-in-a-script

编辑： John D'Errico 2020-1-29

I am working on a script that asks for an input to be given between 1 and 100. I would like to have the restriction that the input is limited to between 1 and 100, and that the number must be a whole number.Here is the code:

number=input('Enter a whole number between 1 and 100:')

while number<1 || number>100

display('Not a valid number please try again')

number=input('Enter a whole number between 1 and 100:')

end

I can't figure out how to get it to set a restriction to non-whole number values. Please let me know how to specify this. I have been searching for a while and haven't found the solution.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

John D'Errico 2020-1-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/502648-help-restricting-non-whole-numbers-in-a-script#answer_412711

编辑：John D'Errico 2020-1-29

在 MATLAB Online 中打开

A very easy check is just:

rem(number,1) ~= 0

So if number has a fractional part, then rem(number,1) will return that fractional part. Then I tested to see if the fractional part was zero.

Slightly shorter is just

~rem(number,1)

but that is I think less obvious. Try it out though. What does that code fragment return when number has a fractional part? Does it return true or false? What does it do when number is a pure integer?