Using Variables in PHP

To assign a value to a variable, the = sign is used, which is called the assignment operator. Let's, for example, assign the number 3 to the variable $a:

php<?php
  $a = 3;
?>

Now let's output the contents of the variable $a to the screen using the echo command:

php<?php
  $a = 3;
  echo $a; // will output the number 3 to the screen
?>

Задание 1

Create a variable $num and assign it the value 123. Output the value of this variable to the screen using the echo command.