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JavaScript Practice Questions And Answer

Problem: Write a program to calculate factorial using function with argument and with return type.
Solution:

<html>
 <head>
  <script>
    function factorial(n)
  {
    if(n==1)
    {
      return 1
    }
      var f = n * factorial(n-1)
       return f
  }
    function demo1()
    {
      var fact = factorial(7)
      document.write(fact+"<br>")
    }
  </script>
 </head>
    <body>
     <input type="button" value="Go" onclick="demo1()" /><br>
    </body>
</html>

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