what to do when there are same conditions in if and elseif

Question

Roxanne Esguerra 2020-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/558391-what-to-do-when-there-are-same-conditions-in-if-and-elseif

编辑： Roxanne Esguerra 2020-7-3

Here is my code,

if denominator==0
    disp('Division by 0 is not possible.');
elseif numerator==0 && denominator==0
        disp('The result is indeterminate.');
else
    result = numerator/denominator;
    fprintf('The result of the fraction is %.2f',result);
end

When the denominator is set to 0, it displays "Division by 0 is not possible."

When both the numerator and denominator are set to 0, it still displays "Division by 0 is not possible.". But it should be displaying: "The result is indeterminate.".

I think it's because of the same conditions in if and elseif that is denominator==0.

What should I do?

Thanks in advance!

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Answer 1

Gaurav Aggarwal 2020-7-2

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https://ww2.mathworks.cn/matlabcentral/answers/558391-what-to-do-when-there-are-same-conditions-in-if-and-elseif#answer_459988

编辑：Gaurav Aggarwal 2020-7-2

在 MATLAB Online 中打开

Hi Roxanne,

You are right. Since both the conditions have denominator == 0 common, if clause will become true and you get 'Division by 0 is not possible.'

For your application, you can re-order the if elseif clauses like following:

if numerator==0 && denominator==0
    disp('The result is indeterminate.');
elseif denominator==0
    disp('Division by 0 is not possible.');
else
    result = numerator/denominator;
    fprintf('The result of the fraction is %.2f',result);
end