From my understanding of the question, you want to create a basic password checker using basic programms constructs like "if" statements and "for/while" loops. You can make the following changes to your code to make sure it functions.
- Use a "string" (double quotes, "test1234") instead of a "character array" (single quotes, 'test1234') for your key. This is because using the "~=" operator with a "character array" returns an array of logical values instead of a scalar.
- The length and the value of the entered password need to be checked simultaneously. This can be done using the short-circuit OR operator.
The resulting code would be as follows.
key = "test1234";
x = input('Enter the password: ','s') ;
while strlength(x) ~= strlength(key) || x~=key
fprintf('\nInput = %s',x);
fprintf('\nPassword is incorrect.');
x = input('Enter the password: ','s');
end
fprintf('Password is correct.');
Normally, if "x" and "key" are of different lengths, the "~=" operator would throw an error. However, the short-circuit "||" operator would not evaluate the right side if the left side evaluates to "true" and so no error is thrown in this case.
