cancel button code in inputdlg box in MATLAB

hi all i need help to get cancel button code in inputdlg box in MATLAB.when i press cancel button i got error. please reply me in a soon time if any one know the answer.

my code is

global A;

[angle]= inputdlg('Please Input Angle');

angle = str2double(angle);
A=imrotate(A,angle,'crop');

subplot(231),imshow(A),title('Orginal Image with Rotation');

Many thanks

Answer 1

[Walter Roberson]

If you use cancel, then the return from inputdlg will be the empty matrix, detectable with isempty()

[Taleb Almajrbi]

Hi

can you explain more Please how to do it in the code?

thannks