How to reverse a number?

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Jessica 2014-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/163253-how-to-reverse-a-number

回答： saurabh jare 2023-3-7

Hi,

I want to reverse a number without using MATLAB functions "digitrevorder()" and "fliplr()". Please help. Thank you!

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回答（3 个）

Evan 2014-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/163253-how-to-reverse-a-number#answer_159380

在 MATLAB Online 中打开

x = 1234;
s = num2str(x) - '0';
xr = polyval(s(end:-1:1),10)

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John D'Errico 2014-11-18

编辑：John D'Errico 2014-11-18

A moderately interesting question is to find a solution in one line, without needing to form an intermediate variable. (And without the application of fliplr!) Seems trivial with that function.

Guillaume 2014-11-18

编辑：Guillaume 2014-11-18

You also want to disallow rot90, flipud and flip, otherwise it's also trivial.

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Syed Haider 2014-11-18

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A = [1 2 3 4; 5 6 7 8];
y = A(:,end:-1:1)

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Syed Haider 2014-11-18

Yeah you are right :) I am sorry. Should i remove the answer? or may be it will be helpful for someone.

John D'Errico 2014-11-18

I don't see any reason to remove it.

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saurabh jare 2023-3-7

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https://ww2.mathworks.cn/matlabcentral/answers/163253-how-to-reverse-a-number#answer_1187395

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function ran=reverse_number(x)
%x=input('Enter the value for checking the palindromic= \n');
check=x;
ran=0;
while (check~=0)
    ran=(ran*10)+mod(check,10);
    check=fix(check/10);
end