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Logical NOT in JavaScript

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undefined is false
NaN is false
undefined is false
null is false
false is false
0 is false
 is false
 is false
 is true
[object Object] is true


    
                		
                
                    

                          
                                
                                
                        
                         



                        
                        
                        

                        

                        
                        

                          
                                
                                
                                  

                                    
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