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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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