how to ask a for input, and keep asking the same question until the right input is inputted?

If I want the user to input an even number, and keep asking the user to input another number if they input an odd number or zero.

[Stephen23]

Use a while loop.

[madhan ravi]

upload your code

[Man Hon Morrison Kong]

x = input('Please, input an even number ')
if x==0
    disp('This number is zero,please rerun the programme again,sorry this is not automatic')
elseif mod(x,2) == 0
    disp('the number is even')
else
    disp('This is an odd number,please rerun the programme again,sorry this is not automatic')
end
%this is what I did, but I dont know how to put it into a while loop.

Answer 1

[per isakson]

One way. n avoids running forever.

%%
n = 0;
while n <= 12
    n = n + 1;
    x = input('Please, input an even number ');
    if x==0
        disp('This number is zero, please rerun the programme again, sorry this is not automatic')
    elseif mod(x,2) == 0
        disp('the number is even')
        break
    else
        disp('This is an odd number, please rerun the programme again, sorry this is not automatic')
    end
end