Solve the following summation of series using JavaScript?

1=1
1+2=3
1+2+3=6
1+2+3+4=10
...
1+2+3+4+...+n=n*(n+1)/2

 
 <script>
  var n=6;
  for(i=1;i<=n;i++){   
      var total=0;
      for(j=1;j<=i;j++){
        document.write(j)
        if(j<i){            
         if(i!=1){  
            document.write("+"...

Mohammad Towhidul Islam

28-Feb-21 01:25:59 pm

Basic Email Validation with JavaScript

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
...

Mohammad Towhidul Islam

18-Jan-21 11:58:26 am

জাভাক্রিপ্ট : অপারেটর

INDEX 
1.  Arithmetic Operators 
2.  Assignment Operators 
3.  Comparison Operators 
4.  Logical Operators 
5.  Bitwise Operators 
6.  Special Operators 

 Arithmetic Operators 
 
       
     Symbol   
     Operations     
  
       
     +   
     Addition     
  
       
     -    
     Subtr...

MD. Shafiqul Islam

04-Apr-18 02:29:58 pm

How to Find or check prime number in JavaScript?

You can follow my code step by step. And I hope Finally you can understand the logical matter to find prime number. so lets start step by step..
 
Step-1: write the following HTML code like:
 
<div class="content"> 
	<div class="leftCol"> 
    	<input type=&quo...

MD. Shafiqul Islam

31-Mar-18 12:13:34 am

What is continue statement ? How it works in JavaScript ?

continue statement: 
The continue statement tells the interpreter to immediately start the text iteration of the loop and skip remaining code block.
এর বাংলা অর্থ হচ্ছে ... 
continue statement Interpreter কে বলে Loop চলাতে অবশিষ্ট কোড ব্লকটি বাদ দিয়ে । 

এর মানে হচ্ছে continue statement অবশিষ্ট ...

Mohammad Towhidul Islam

01-Feb-17 11:13:19 am

JavaScript Module Pattern: In-Depth

The module pattern is a common JavaScript coding pattern. It’s generally well understood, but there are a number of advanced uses that have not gotten a lot of attention. In this article, I’ll review the basics and cover some truly remarkable advanced topics, including one which I think is origin...

Mohammad Towhidul Islam

09-Jun-16 10:54:06 am

Numbers Program: Positive, Negative, and Zero numbers

Given a list of numbers, find out how many are positive, how many are negative, and how many are zero.

16,3,-7,0,4,-6,-2,8

 
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Numbers Program</title>
</head>

<body>
<script>...

Mohammad Towhidul Islam

15-Apr-16 11:37:17 am

[O`Reilly] - JavaScript. The Definitive Guide, 6th ed.

Download  The Definitive Guide  ...

Mohammad Towhidul Islam

05-Mar-16 06:32:57 pm

আপওয়ার্ক,ফাইভার ছাড়াও রয়েছে আরও ৪২ ওয়েবসাইট

১.FlashDen ডট নেট-ফ্ল্যাশ ফাইল বিক্রয় করার marketplace।বিক্রিত দামের অন্তত ৪০% থেকে ৭০% প্রদান করা হয়।
২.VideoHive ডট নেট- আপনার শেয়ার ভিডিও ফুটের মাপে দৈর্ঘ্য এবং গতি চিত্রছবি এই ওয়েব সাইটে বিক্রি করুন।
৩.ThemeForest ডট নেট-ওয়েব নকশা,টেমপ্লেটুন,ইত্যাদি জমা দিয়ে ৪০% পর্যন্ত আয় করূন।আমি নিজে এই সাই...

Mohammad Towhidul Islam

17-Feb-16 04:52:43 pm

Land Measuring Converter

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Land Measuring Converter</title>
<script>
  function cal(){
	  var from=document.f.cmbFromUnit.value;
	  var to=document.f.cmbToUnit.value;
	  var amount=parseFloat(document.f.txtAmou...

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