How to calculate the area and perimeter of a circle in JavaScript?

JavascriptWeb DevelopmentFront End Technology

To calculate the area and perimeter of a circle, you can try to run the following code −

Example

<html>
   <head>
      <title>JavaScript Example</title>
   </head>
   <body>
      <script>
         function Calculate(r) {
            this.r = r;
            this.perimeter = function () {
               return 2*Math.PI*this.r;
            };

            this.area = function () {
               return Math.PI * this.r * this.r;
            };
         }
         
         var calc = new Calculate(5);
         
         document.write("Area of Circle = ", calc.area().toFixed(2));
         document.write("<br>Perimeter of Circle = ", calc.perimeter().toFixed(2));
      </script>
   </body>
</html>
raja
Published on 16-Feb-2018 07:53:26
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