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                    | Title | Test
                        Details
                        
                        
                            Pattern Title | 
                
                    | Expression | 
                            ^0$|^[1-9][0-9]*$|^[1-9][0-9]{0,2}(,[0-9]{3})$
                         | 
                
                    | Description | I need a pattern to match the whole number / integer (0-99999...), but also allow users to put comma in the thousand positions. 
This is what I got. | 
                
                    | Matches | 1234 | 0 | 12,345 | 
                
                    | Non-Matches | 12,3245 | -1 | 1234.23 | 
                
                    | Author | Rating:  Harry Chou | 
            
        
    
        
        
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