Operators

Here are lists of the most commonly used operators and their meanings, with examples.

Table 1. Arithmetic operators

Operator	Meaning	Example
+	addition	$a + $b
-	subtraction	$a - $b
*	multiplication	$a * $b
/	division	$a / $b
%	modulus	$a % $b
++	increment	$a++
--	decrement	$a--

Table 2. Logical operators

Operator	Meaning	Example
&&	and	$a && $b
||	or	$a || $b
!	not	!$a

Table 3. Assignment operators

Operator	Meaning	Example
=	assign	$a = $b
+=	add to	$a +=1
-=	subtract from	$a -=1
.=	append	$str.="foo"

Table 4. Relational operators used in string context

Operator	Meaning	Example
eq	equivalent	$str eq "foo"
ne	not equivalent	$str ne "foo"
gt	greater than	$str gt "123"
lt	less than	$str lt "123"
ge	greater than or equal to	$str ge "123"
le	less than or equal to	$str le "123"

Table 5. Relational operators used in numeric context

Operator	Meaning	Example
==	equivalent	$num == 100
!=	not equivalent	$num! = 100
>	greater than	$num>100
<	less than	$num<100
>=	greater than or equal to	$num>=100
<=	less than or equal to	$num<=100

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