PHP Program to string

<?php
$name = "John";
echo "Hello, $name!";
?>

In this example, the string "Hello, $name!" contains a variable (`$name`) which is interpolated into the string. When the code is executed, the output will be:

Hello, John!

<?php
$name = 'Jane';
echo 'Hello, ' . $name . '!';
?>

In this example, the string "Hello, " is concatenated with the variable `$name` and the string "!" using the `.` operator. The output will be :

Hello, Jane!

<?php
echo "First line.\nSecond line.\nThird line.";
?>​

First line.
Second line.
Third line.​