Repeated user input for even numbers

Question

0 个投票

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?

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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.')

Hariyali Ramesh 2019-1-24

Thanks, this helped.

Answer 1

Adam Danz 2019-1-24

编辑：Adam Danz 2019-1-24

0 个投票

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:

Hariyali Ramesh 2019-1-24

Thanks for the help.