PHP-MySQLi Series 5.4|| increment or decremenst operators

Increment/Decrement Operators:

This operator is used to increase or decrease the value by 1. Mainly there are two ways to increase or decrease the value of variable. They are : 1) Pre-Increment and Pre-Decrement 

                                                                                   (2) Post-Increment and Post-Decrements.

Examples	Name	Effects
++$x	Pre-increments	Increment $x by one, then return $x
$x++	Post-increments	Return $x, then increment $x by one
--$x	Pre-decrements	Decrement $x by one, then return $x
$x++	Post-decrements	Return $x, then decrement $x by one

Let’s see one by one:

Pre-Increment:

Pre-increment helps to increase by value by 1 and return the value after adding.

example

<?php

$x= 10;

echo ++$x;

?>

Output:

11

Post-Increment:

Post-increment returns the original value $y then only increase the value of $y by one

<?php

$y = 10;

echo $y++;

echo “<br>$y”;

?>

Output:

10

11

Pre-decrements:
 Pre-decrements helps to decrease by value by 1 and return the value after subtracting.

example

<?php

$x= 10;

echo --$x;

?>

Output:

9

Post-Increment:

Post-decrement returns the original value $y then only decrease the value of $y by one

<?php

$y = 10;

echo $y--;

echo “<br>$y”;

?>

Output:

10

9