how can I keep the user to input a value that is devisable by 7

Question

mat geek 2019-3-31

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/453515-how-can-i-keep-the-user-to-input-a-value-that-is-devisable-by-7

评论： madhan ravi 2019-3-31

hello,

I think the answer to this is very simple. the code that I am trying to do is to keep asking for a number that is divisable by 7. once the user enters a number that is div by 7, the code ends. I got the part where the user input is div by 7 and ends, but I cant find a way to keep asking for input if the number is not div by 7. here is what I got.

usernum = input('enter a posative number: ');
i = 1;
deviby7 = rem(usernum, 7);
while  i > 0 
    if deviby7 ~= 0
        fprintf('incorrect input\n')       
    elseif deviby7 == 0
        fprintf('correct input\n')  
         i = i -1;
    end
end  

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Answer 1

madhan ravi 2019-3-31

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/453515-how-can-i-keep-the-user-to-input-a-value-that-is-devisable-by-7#answer_368287

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while  1
    usernum = input('enter a positive number: ');
    deviby7 = rem(usernum, 7);
    if  ~deviby7
        fprintf('correct input\n')
        break
    else
        fprintf('incorrect input\n')
    end
end