Why should we not use ++, -- operators in JavaScript?

JavascriptWeb DevelopmentFront End Technology

The increment (++) and decrement (---) operators should be avoided since it can lead to unexpected results. Here are some of the conditions −

Example

In an assignment statement, it can lead to unfavorable results −

Live Demo

<html>    
   <body>      
      <script>          
         var a = 5;          
         var b = ++a;          
         var c = a++;          
         var d = ++c;              
         document.write(a);          
         document.write("\r"+b);          
         document.write("\r"+c);          
         document.write("\r"+d);            
      </script>    
   </body>
</html>

Output

Whitespace between the operator and variable can also lead to unexpected results −

a = b = c = 1; ++a ; b -- ; c;
raja
Published on 23-Apr-2018 20:54:37
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