Number format in PHP with easy example

Hello friends, this is my first tutorial of PHP and I am starting with the Numbers. As for any programming language the Numbers are the basics so I am thinking that starting PHP is better with numbers. Today I will discuss Number format in PHP with easy example. I will discuss with you the various ways in which we can use numbers and also give you examples by using which you can easily manipulates with Numbers. First thing to take into consideration is that every PHP code is written within:

 <?php  Your Code Comes Here ?>

For Working with Numbers we need variables. So let's create some variables in PHP :

 <?php 
$var1=3;
$var2=4;
?>

Now lets look at some basic operations that we can perform with numbers in PHP :

Arithmetic Operation :   <?php    echo ((1+3+$var1)*$var2)/2-5;   ?>
+= Opeation :   <?php   $var2+=4;   ?>
-= Operation :   <?php    $var2-=4;   ?>
*=& Operation :   <?php    $var2*=4;   ?>
/= Operation :   <?php    $var2/=4;   ?> 
Increment:   <?php    $var2++;   ?>
Decrement:   <?php    $var2--;   ?>

Now Lets work with some floating point numbers. I will show you how you can perform some basic operations with Floating point numbers in PHP :

 Declaring Floating point Variable:
<?php 
$var3=3.14;
echo 4/3; 
?>
Printing Floating point Variable:   <?php    echo $var3;    ?>
Round:   <?php    echo round($var3);    ?>
Ceiling Value:   <?php    echo ceil($var3);    ?>
Floor Value:   <?php    echo floor($var3);    ?>
Absolute Value:   <?php    echo abs(0-200);    ?>
Power:   <?php    echo pow($var3,2);    ?>
Square Root:   <?php    echo sqrt($var3);    ?>
Random Value:   <?php    echo rand();    ?>
Random Min-Max:   <?php    echo rand(1,100);    ?>
Modulus:  <?php    echo fmod(20,7);    ?>