CHECK
                                   
                         |  
                              
                     
This command is used to check if the syntax of the source code currently in the editor work area contains any errors.
| Mode | Reaction | 
|---|---|
| Online |  Syntax checking stops when a syntax error is detected, and the
                                   source-code line that contains the error is marked with E in the
                                   corresponding editor.
                         |  
                              
                     
| Batch | Syntax checking continues until all statements have been checked, and all errors detected are included in the output listing. | 
See also Natural Compiler in Natural System Architecture.