Perl  Operators
Operators are used to perform operation on a single operand or two operands. Operators in Perl can be categorized as follows:
 Arithmetic operators
 Assignment operators
 Comparison operators
 Increment/Decrement operators
 Logical operators
 Bitwise operators
 QuoteLike operators
 Miscellaneous operators
Perl Arithmetic operators
Arithmetic operators are used to perform arithmetic operations on two operands.
Operator  Name  Description 

+  Addition  Add two values 
  Subtraction  Subtract one value from another 
*  Multiplication  Multiply two values 
/  Division  Divide one value by another 
%  Modulo  Returns remainder of division operation 
**  Exponent / Power  Returns first operand raised to the power of second operand 
Example
Perl Assignment operators
Assignment operators are used to assign values of right hand side expression to left hand side operand.
Operator  Expression  Equivalent to  Description 

=  a = 5  a = 5  Example 
+=  a += b  a = a + b  
=  a = b  a = a  b  
*=  a *= b  a = a * b  
/=  a /= b  a = a / b  
%=  a %= b  a = a % b  
**=  a **= b  a = a ** b  
&=  a &= b  a = a & b  More Info 
=  a = b  a = a  b  More Info 
^=  a ^= b  a = a ^ b  More Info 
>>=  a >>= b  a = a >> b  More Info 
<<=  a <<= b  a = a << b  More Info 
Perl Comparison operators
Comparison operators are used to compare values of two operands. It returns true when values matches and returns false when values does not match. Perl has two sets of comparison operators. One is used for comparing numerical values while other is used for comparing string values.
Numeric Comparison operators
Operator  Description 

==  Equal: Checks the values of two operands and returns true if they are same. 
!=  Not equal: Checks the values of two operands and returns true if they are not same. 
>  Greater than: Checks the values of two operands and returns true if the value of first operand is greater than the value of second operand. 
<  Less than: Checks the values of two operands and returns true if the value of first operand is less than the value of second operand. 
>=  Greater than or equal to: Checks the values of two operands and returns true if the value of first operand is greater than or equal to the value of second operand. 
<=  Less than or equal to: Checks the values of two operands and returns true if the value of first operand is less than or equal to the value of second operand. 
<=>  Comparison Operator: Checks the values of two operands and returns values based on the values of two operands:

Example
String Comparison operators
Operator  Description 

eq  Equal: Checks the values of two operands and returns true if they are stringwise same. 
ne  Not equal: Checks the values of two operands and returns true if they are stringwise not same. 
gt  Greater than: Checks the values of two operands and returns true if the first operand is stringwise greater than the second operand. 
lt  Less than: Checks the values of two operands and returns true if the first operand is stringwise less than the second operand. 
ge  Greater than or equal to: Checks the values of two operands and returns true if the first operand is stringwise greater than or equal to the second operand. 
le  Less than or equal to: Checks the values of two operands and returns true if the first operand is stringwise less than or equal to the second operand. 
cmp  Comparison Operator: Checks the values of two operands and returns values based on the values of two operands:

Example
Perl Increment/Decrement operators
Increment and decrement operators are used to increase and decrease the value of variable.
Operator  Name  Description  Example 

++$x  Preincrement  Increases the value of $x by 1, then returns $x.  Example 
$x++  Postincrement  Returns $x, then increases the value of $x by 1.  
$x  Predecrement  Decreases the value of $x by 1, then returns $x.  Example 
$x  Postdecrement  Returns $x, then decreases the value of $x by 1. 
Perl Logical operators
Logical operators are used to combine two or more conditions.
Operator  Name  Description 

and  Logical AND  Returns true when all conditions are true 
&&  
or  Logical OR  Returns true when any of the conditions is true 
  
not  Logical NOT  Returns true when given conditions is not true 
! 
More Info
Perl Bitwise operators
Bitwise operators are used to perform bitwise operations on two operands.
Operator  Name  Description  More Info 

&  AND  Returns 1 if both bits at the same position in both operands are 1, else returns 0.  More Info 
  OR  Returns 1 if one of two bits at the same position in both operands is 1, else returns 0.  More Info 
^  XOR  Returns 1 if only one of two bits at the same position in both operands is 1, else returns 0.  More Info 
~  NOT  Reverse all the bits.  More Info 
>>  Right shift  The left operand is moved right by the number of bits present in the right operand.  More Info 
<<  Left shift  The left operand value is moved left by the number of bits present in the right operand.  More Info 
QuoteLike operators
Perl supports the following Quotelike operators:
Operator  Description 

q{ }  Encloses a string within single quotes. 
qq{ }  Encloses a interpolated string within double quotes. 
qx{ }  Encloses a (possibly) interpolated string and then executed as a system command, via /bin/sh or its equivalent if required. 
Perl Miscellaneous operators
The table below describes other operators supported by Perl:
Operator  Description 

ternary operator (?:)  Returns one of the two values based on value of boolean expression. 
Perl Operators Precedence
Operator precedence (order of operations) is a collection of rules that reflect conventions about which procedures to perform first in order to evaluate a given expression.
For example, multiplication has higher precedence than addition. Thus, the expression 1 + 2 × 3 is interpreted to have the value 1 + (2 × 3) = 7, and not (1 + 2) × 3 = 9. When exponent is used in the expression, it has precedence over both addition and multiplication. Thus 3 + 5^{2} = 28 and 3 × 5^{2} = 75.
The following table lists the precedence and associativity of Perl operators. Operators are listed top to bottom, in descending precedence. Operators with higher precedence are evaluated before operators with relatively lower precedence. When operators have the same precedence, associativity of the operators determines the order in which the operations are performed.
Precedence  Operator  Description  Associativity 

25  terms and list operators  terms and list operators (leftward)  Left to Right 
24  >  Arrow operator  
23  ++a a  Prefix increment, Prefix decrement  nonassociative 
a++ a  Postfix increment, Postfix decrement  
22  **  Exponentiation operator  Right to Left 
21  !  Logical NOT  
~  Bitwise NOT  
~.  Bitwise string NOT  
\  Reference operator  
+a a  Unary plus and minus  
20  =~ !~  Pattern matching operators  Left to Right 
19  * / %  Multiplication, Division, Remainder  
x  Repetition operator  
18  +  .  Addition, Subtraction, Concatenating operator  
17  << >>  Bitwise left shift and right shift  
16  Named unary operators  Named unary operators  nonassociative 
15  isa  Class instance Operator  
14  < <= > >=  Less than, Less than or equal, Greater than, and Greater than or equal  chained 
lt le gt ge  String comparison operators: Less than, Less than or equal, Greater than, and Greater than or equal  chained  
13  == !=  Equality and inequality operator  chain/na 
eq ne  String equality and inequality operator  
<=>  Two sided comparison operator  
cmp  String two sided comparison operator  
~~  Smartmatch operator  
12  & &.  Bitwise AND, Bitwise string AND  Left to Right 
11   .  Bitwise OR, Bitwise string OR  
^ ^.  Bitwise XOR, Bitwise string XOR  
10  &&  Cstyle Logical AND operator  
9    Cstyle Logical OR operator  
//  Perlstyle Logical OR operator  
8  ..  Range operator  nonassociative 
...  yadayada operator  
7  a?b:c  ternary (conditional) operator  Right to Left 
6  =  Direct assignment  
+= = *= /= %= **=  Compound assignment by addition, subtraction, multiplication, division, remainder, and exponentiation  
<<= >>=  Compound assignment by Bitwise left shift and right shift  
&= ^= =  Compound assignment by Bitwise AND, XOR and OR  
&.= ^.= .=  Compound assignment by Bitwise string AND, XOR and OR  
goto  goto statement  
last  last statement  
next  next statement  
redo  redo statement  
dump  dump statement  
5  , =>  Comma operators  Left to Right 
4  list operators  list operators (rightward)  non assoc 
3  not  Logical NOT  Right to Left 
2  and  Logical AND  Left to Right 
1  or  Logical OR  
xor  Bitwise XOR 