display a 0 value in a string

Am making a face counter , my main problem is that whe it dosent detect a face, matlab dosent print a '0' value , on the command box just dosent apear anything unless it detects a face.

Am ussing the following code.

 n= size (bbox,1);  
   str_n= num2str(n);
            str= strcat( 'number of faces are ', str_n);
            display(str);

[Dyuman Joshi]

How exactly are you detecting a face? by the number of rows of bbox?

[Jesus Sanchez]

yes, the bbox is the bounding box & 1 represents the # of rows in bounding box

[Walter Roberson]

We would probably need to see the surrounding code to see if possibly that code is not executed in that situation.

By the way, I recommend you have a look at fprintf