In this  tutorial, I will show you how a program using PHP to ask the user to give six numbers and then

the program will compute the sum of six numbers given  by the user.

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Program Listing

<!DOCTYPE html>
<html lang="en">
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Addition of Six Numbers in PHP</title>

          body {
               background: #f1f1f1;
               font-family: arial;
               size : 16px;

          form {
               background-color: rgba(0, 0, 0, 0.7);
               color: #000;
               padding: 50px;
               position: absolute;
               -webkit-transform: translate(-50%, -50%);
               transform: translate(-50%, -50%);
               left: 50%;
               top: 50%;
          .row {
               display: block;
               font-size: 0;
               margin-bottom: 18px;
          h1 {
               color: #fefefe;
               text-align: center;
               margin: 0 0 40px 0;
          .row label {
               width: 180px;
               color: #fefefe;
               text-transform: uppercase;
               padding-left: 0!important;
          .row input,
          .row textarea {
               background-color: #fefefe;
               width: 280px;
               color: #000000;
          .row textarea {
               resize: none;
          .row label,
          .row input,
          .row textarea {
               vertical-align: top;
               display: inline-block;
               border: 0;
               margin: 0;
               padding: 15px;
               font-size: 15px;
          form button {
               background-color: #16222A;
               width: 250px;
               display: inline-block;
               border: 0;
               padding: 15px;
               color: #fefefe;
               font-size: 15px;
               text-transform: uppercase;
               cursor: pointer;
          form #btnClear {
               background-color: #486980;
          button:focus {
               outline: none;

     $num1 = $_POST['txtFirstNum'];
     $num2 = $_POST['txtSecondNum'];
     $num3 = $_POST['txtThirdNum'];
     $num4 = $_POST['txtFourthNum'];
     $num5 = $_POST['txtFifthNum'];
     $num6 = $_POST['txtSixthNum'];
     $result = $_POST['txtResult'];

   if(isset($_POST['submit'])) {
       $result = ($num1+$num2+$num3+$num4+$num4+$num5+$num6);

     if(isset($_POST['clear'])) {
       $num1 = "";
       $num2 = "";
       $num3 = "";
       $num4 = "";
       $num5 = "";
       $num6 = "";

     <form action="" method="post">
          <h1>Addition of Six Numbers in PHP</h1>
          <div class="row">
               <label for="txtFirstNum">Give First Number</label>
               <input type="text" name="txtFirstNum" id="txtFirstNum"
                value="<?php echo $num1; ?>" autofocus>>
          <div class="row">
               <label for="txtSecondNum">Give Second Number</label>
               <input type="text" name="txtSecondNum" id="txtSecondNum"
               value="<?php echo $num2; ?>">>
          <div class="row">
               <label for="txtThirdNum">Give Third Number</label>
               <input type="text" name="txtThirdNum" id="txtThirdNum"
               value="<?php echo $num3; ?>">>
          <div class="row">
               <label for="txtFourthNum">Give Fourth Number</label>
               <input type="text" name="txtFourthNum" id="txtFourthNum"
               value="<?php echo $num4; ?>">>
          <div class="row">
               <label for="txtFifthNum">Give Fifth Number</label>
               <input type="text" name="txtFifthNum" id="txtFifthNum"
                 value="<?php echo $num5; ?>">
          <div class="row">
               <label for="txtSixthNum">Give Sixth Number</label>
               <input type="text" name="txtSixthNum" id="txtSixthNum"
               value="<?php echo $num6; ?>">
           <div class="row">
               <label for="txtSixthNum">The Result</label>
               <input type="text" name="txtResult" id="txtResult"
               value="<?php echo $result; ?>">
          <div classs="row">
               <button type="submit" name="submit" 
               <button type="submit" name="clear"

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