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What is the best way to initialize a JavaScript number?

The best way to initialize a number in JavaScript is to initialize variables while declaring them. Through this, you can easily avoid undefined values.

Example

You can try to run the following code to initialize a number −

<!DOCTYPE html>
<html>
   <body>
      <script>
         var deptNum = 20, id = 005;
         document.write("Department number: "+deptNum);
      </script>
   </body>
</html>