MATH Operators
In the following examples,
$a is 10 and $b is 2

+

Addition $c=$a+$b;                 # $c is now 12
- Subtraction $c=$a-$b;                 # $c is now 8
* Multiplication $c=$a*$b;                 # $c is now 20
/ Division $c=$a/$b;                 # $c is now 5
% Modulus $c=$a%3;                  # $c is now 1
** Exponent $c=$a**$b;                # $c is now 100
++ Increment (+1) $a++;                     # $a is now 11
- - Decrement (-1) $a--;                     # $a is now 9
+= Add and assign $a+=$b;                   # $a is now 12
-= Subtract and assign $a-=$b;                   # $a is now 8
*= Multiply and assign $a*=$b;                   # $a is now 20
/= Divide and assign $a/=$b;                   # $a is now 5
%= Modulus and assign $a%=3;                    # $a is now 1
**= Exponent and assign $a**=$b;                  # $a is now 100
NUMERIC Relational Operators
In the following examples,
$a is 10 and $b is 2
== Equality  
!= Inequality  
> Greater than  
< Less than  
>= Greater than or Equal to  
<= Less than or Equal to  

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 This page last updated on September 04, 2011