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<html>

<body>

<FORM ACTION="<?php $_SERVER['PHP_SELF']; ?>" method="POST">

<table>

<tr><td><h3>Enter first no :</td><td><input type=text name=no1  ></h3></td></tr>

<tr><td><h3>Enter second no :</td><td><input type=text name=no2></h3></td></tr>

<tr><td><b>Select Operation which u have to perform :</b></td>

 <td><select name=cal>

 <option value="1">Addition</option>

<option value="2">Substraction</option>

  <option value="3">Multiplication</option>

  <option value="4">Division</option>      

</select></td></tr>       

<tr><td></td><td><input type=submit name=submit value=Calculate></td></tr>

</table>

</form>        

</body>

</html>




<?php

  if(isset($_POST['submit']))

              {

                          $no1=$_POST['no1'];

                          $no2=$_POST['no2'];

                          $cal=$_POST['cal'];

             
                          if((!empty($no1)) && (!empty($no2)))

                          {

                                      switch($cal)

                                      {

                                                  case 1:$add=$no1+$no2;

                                                              echo "<h1>addition=".$add."</h1>";

                                                                          break;


 
                                                  case 2:$sub=$no1-$no2;

                                                              echo "<h1>subtraction=".$sub."</h1>";

                                                                          break;



                                                  case 3:$mult=$no1*$no2;

                                                              echo "<h1>multiplication=".$mult."</h1>";
                                                                          break; 


             
                                                                                     
                                                  case 4:$div=$no1/$no2;

                                                                          echo "<h1>division=".$div."</h1>";

                                                                          break;


 

                         
                                      }     
                             
                          }

                          else echo "Please enter both 2 nos";    
 
              }

              else

              die("not able to acccess");

  ?>

1) Write a PHP program to create a simple calculator that can accept two numbers andperformoperations like add, subtract, multiplication and divide (using Self Processing form)

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