Repeated user input for even numbers

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Hariyali Ramesh
Hariyali Ramesh 2019-1-24
评论： Hariyali Ramesh 2019-1-24
The code needs to keep asking for user input until an even number is inputted. I've got this code so far:
a = input('Input a value: ');
b = 2;
if rem(a,b) == 0
disp('Your value is even.')
else
a = input('Input a value of a');
end
but this only works twice when an odd number has been entered. How do I get it to keep asking for an input until an even number has been entered?
  2 个评论
Sarah Crimi
Sarah Crimi 2019-1-24
%Create variable modvalue and use while loop to remain asking.
modvalue = 1;
while(modvalue~=0)
a = input('Input a value: ');
b = 2;
modvalue = rem(a,b)
end
disp('Your value is even.')

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采纳的回答

Adam Danz
Adam Danz 2019-1-24
编辑：Adam Danz 2019-1-24
The while loop will continually ask for a non-zero even integer until one is entered.
prompt= 'Input a value: '
z = 1;
while mod(z,2)~=0
z= input(prompt)
end
Very similar question was asked on the same day here:
https://www.mathworks.com/matlabcentral/answers/441330-how-can-i-use-a-while-loop-to-check-if-user-input-is-an-integer

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