Get Factorial of a Number using jQuery




In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example,

5! = 5  \times  4  \times  3  \times  2  \times  1 = 120.  \

The value of 0! is 1, according to the convention for an empty product.

Read full about factorial  here on wikipedia.



We will use For loop for getting factorial  of  a number, so we just have to decrease value by one and multiply with previous holding temporary value, We have to initiate temporary value with 1.


The Following will be code:



<input type="text" name="factroial4" id="factroial4" />

<br/>

<button type="button" name="button" onclick="GetFactorial();" />
Calculate Factorial
</button>

<br/>

<div id="showresulthere"></div>


<script src="//code.jquery.com/jquery-1.11.2.min.js"></script>

<script>

 // function defination

 function GetFactorial()
   {
var value = $("#factroial4").val();
     tempvalue = 1;
     for ( i=value ; i>0 ;  i-- )
      {
         tempvalue *=  i ;
      // this is same as the   tempvalue =  tempvalue * i ;
      }
$("#showresulthere").html("Factorial of "+value+" is :"+tempvalue);
   }
 
// function defination

</script>

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