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<HTML>
              <HEAD> <TITLE> Using Variables </TITLE> </HEAD>

              <BODY>

              <?php

              $a = 10;
                                                                        Use of + operator
              $b = 5;
                                                                                     Use of - operator
              echo "The sum of two numbers is ", $a+$b;

              echo "<br>The difference of two numbers is ", $a-$b;
              echo "<br>The product of two numbers is ", $a*$b;
                                                                                   Use of * operator
              ?>

              </BODY>
              </HTML>
                Note that the <br> tag is used to print the text in next line. We get the following output by executing
               the preceding script:
















                Relational operators: These operators help to compare quantities and return Boolean value ‘True’ or
               ‘False’ as a result. Relational operators of PHP are ==, !=, >, <, >=, and <=. Let us create a PHP script to
               use some of the relational operators.

               <HTML>

              <HEAD> <TITLE> Using Variables </TITLE> </HEAD>
              <BODY>

              <?php
              $a = 10;
              $b = 5;

              echo "a is greater than b: ", var_dump($a>$b);
              echo "<br>a is less than b: ", var_dump($a==$b);
              echo "<br>a is equal to b: ", var_dump($a>=$b);

              ?>
              </BODY>

              </HTML>


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