Assignment operators

$x = 10

$y = 2

$z = 3

Execute the statement $x += $y; // $x = $x + $y = 10 + 2

$x = 12

Execute the statement $x -= $z; // $x = $x - $z = 12 - 3

$x = 9

Execute the statement $x *= $z; // $x = $x * $z = 9 * 3

$x = 27

Execute the statement $x /= $z; // $x = $x / $z = 27 / 3

$x = 9

Execute the statement $x %= $y; // $x = $x % $y = 9 % 2

$x = 1

Execute the statement $y++; // $y = $y + 1 = 2 + 1

$y = 3

Execute the statement $z--; // $z = $z - 1 = 3 - 1

$z = 2

$name = 'John'

$surname = 'Doe'

Execute the statement $name .= $surname; // $name = $name . $surname = 'John' . 'Doe'

$name = 'JohnDoe'