MATLAB: How can i go back to the fist choose again with out termination after finshing the first task

back to the first choice with out terination

 mynumber = input('Enter a number:');
switch  mynumber
    case -1
        disp('negative one');
    case 0
        disp('zero');
    case 1
        disp('positive one');
    otherwise
        disp('other value');
end
hello every one 
I wrote some code which repeatedly do some task
eg like this above which is in mat lab docc.  
when I select the first choice(1}
the program does the first statement only and stops.what i want is ,after compelitilng the first task it  should asks me again if i want to choose the choices starting  from choice 1 
how can i do that?

Best Answer

Use a while-loop:
      mynumber = 0;
       while (mynumber ~= 3)  % condition to get out of the loop. Change to your needs
          mynumber = input('Enter a number:');
          switch mynumber 
              case -1 
                  disp('negative one'); 
              case 0 
                  disp('zero'); 
              case 1 
                  disp('positive one'); 
              otherwise
                  disp('other value');
          end
       end
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