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Help needed in java script [Resolved]

Posted by Crniranjanraj under JavaScript on 11/22/2015 | Points: 10 | Views : 1598 | Status : [Member] | Replies : 14
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Write a JavaScript code to find the sum of N natural Numbers. (Use user-defined function)



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Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

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Resolved
Try this (using for loop) 

<html>

   <head>   

      <script type="text/javascript">

         <!--

            function SumofNNaturalNumbers() {



            	var N=10;

            	var sum = 0;

            	for(var i=1;i<=N;i++)

               		sum+=i;

               	alert("Sum Of N Natural Numbers : " + sum);

            }

         //-->

      </script>      

   </head>   

   <body>

      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />

   </body>   

</html>


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RNA Team

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Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

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Resolved
Using While loop

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {

            	var N=10;
            	var sum = 0;
            	var i=1;

            	while(i<=N) {
            		sum+=i;
            		i++;
            	}            	
               	alert("Sum Of N Natural Numbers : " + sum);
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

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Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

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Resolved
Using the mathematical formula (this is the optimized one since this yields O(1) always)

Sum of N Natural Numbers=(n*(n+1))/2 

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {
            	var N=10;
            	var sum = 0;            	
            	sum = (N * (N+1)) /2;            	    	           	
               	alert("Sum Of N Natural Numbers : " + sum);
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

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Resolved
Using Map and Foreach function

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {
            	var N=10;
            	var sum = 0;             	

		 Array.apply(null,Array(N)) 
     		.map(function(_, index){
              	return index+1;
          	})
          	.forEach(function(number) {
  			sum += number;
		});	
               	alert("Sum Of N Natural Numbers : " + sum);
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

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Resolved
Using Map and Reduce function
<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {
            	var N=20;
            	var sum = 0;             	

				 var sum = Array.apply(null,Array(N)) 
     				.map(function(_, index){
              		return index+1;
          			})
          			.reduce(function(a,b){return a + b})
               	alert("Sum Of N Natural Numbers : " + sum);
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

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Resolved
Using recursive function

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {

            	var N = 10;
            	sum  = SumofNNumbers(N);
            	alert("Sum Of N Natural Numbers : " + sum);
            }

            //using recursive function
            function SumofNNumbers(n){
            	if(n==1) return n;
     		else return (n + SumofNNumbers(n-1));
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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Using Do..while loop

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {

            	var N=10;
            	var sum = 0;
            	var i=1;

            	do{
            		sum+=i;
            		i++; }while(i<=N);
            	           	
               	alert("Sum Of N Natural Numbers : " + sum);
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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Using for..in loop

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {
            	var N=10;
            	var sum = 0; 
            	var numbers = [];
            	var count = 1;           	

		 while ( count <= N+1 ) numbers.push( count++ );				 
		 for(var number in numbers) { sum += parseInt(number);}
               	 alert("Sum Of N Natural Numbers : " + sum);
            }
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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Using Map, Reduce and Arrow function

<html>
   <head>   
      <script type="text/javascript">
         <!--
            function SumofNNaturalNumbers() {

            	var N = 10; 
            	var sum = Array.apply(null,Array(N)) 
     				.map(function(_, index){
              		return index+1;
          			}).reduce((a, b) => a + b);

            	alert("Sum Of N Natural Numbers : " + sum);
            }            
         //-->
      </script>      
   </head>   
   <body>
      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />
   </body>   
</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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Using for loop in a reverse way

<html>

   <head>   

      <script type="text/javascript">

         <!--

            function SumofNNaturalNumbers() {



                var N=10;

                var sum = 0;

                for(var i=N;i>=0;i--)
                        sum+=i;

                alert("Sum Of N Natural Numbers : " + sum);

            }

         //-->

      </script>      

   </head>   

   <body>

      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />

   </body>   

</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

Up
0
Down
Using while loop in a reverse way

<html>

   <head>   

      <script type="text/javascript">

         <!--

            function SumofNNaturalNumbers() {

                var N=10;
            	var sum = 0;            	

            	while(N>0) {
            		sum+=N;
            		N--;
            	}            	
               	alert("Sum Of N Natural Numbers : " + sum);

            }

         //-->

      </script>      

   </head>   

   <body>

      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />

   </body>   

</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/22/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

Up
0
Down
Using do..while loop in a reverse way

<html>

   <head>   

      <script type="text/javascript">

         <!--

            function SumofNNaturalNumbers() {

                var N=10;
            	var sum = 0;           	

            	do{
            		sum+=N;
            		N--; }while(N>0);

               	alert("Sum Of N Natural Numbers : " + sum);

            }

         //-->

      </script>      

   </head>   

   <body>

      <input type="button" onclick="SumofNNaturalNumbers()" value="Sum Of N Natural Numbers" />

   </body>   

</html>


--
Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Crniranjanraj on: 11/23/2015 [Member] Starter | Points: 25

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thanks..it's working

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator
Posted by: Rajnilari2015 on: 11/29/2015 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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Glad that it has helped you (:

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Thanks & Regards,
RNA Team

Crniranjanraj, if this helps please login to Mark As Answer. | Alert Moderator

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