|   |   | 
| $window.hasOutput Checks if a window has a text output widget | 
| Usage | 
| $window.hasOutput $window.hasOutput(<window_id>) | 
| Description | 
| Returns 1 if the window specified by <window_id> has a text output widget and 0 otherwise. The form with no parameters works on the current window. If the specified window doesn't exist then 0 is returned. | 
| See also | 
| $window.hasinput |