Thursday 23 August 2018

Javascript: Increment/decrement: ++, -- operators

Increment & decrement operators
++ Increment operator; increments a value by 1
-- Decrement operator; decrements a value by 1

Pre increment
    Syntax:
    ++variable
      pre increment operator increments the variable value by 1 immediately.
     
Post increment
    Syntax:
        variable++
         post increment operator increments the variable value by 1 after executing the current statement.
   
Pre Decrement
    Syntax:
        --variable
         pre decrement operator decrements the variable value by 1 immediately.
   
Post Decrement
    Syntax:
        variable--
         post decrement operator decrements the variable value by 1 after executing the current statement.

arithmetic.html
<!DOCTYPE html>

<html>
 <head>
  <title>Increment&Decrement Operators</title>
  
  <style>
   p{
    font-size: 2em;
    color: seagreen;
   }
  </style>
 </head>
 
 <body>
  <p>
   <script type="text/javascript">
    var a = 23;
   
    document.write("a = " + a + "<br />");
    document.write("a++ = " + (a++) + "<br />");
    document.write("++a = " + (++a) + "<br />");
    document.write("a-- = " + (a--) + "<br />");
    document.write("--a = " + (--a) + "<br />");
   </script>
  </p>
 </body>
</html>




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