Equality Operators

Perl Equality Operators:

These are also called relational operators. Assume variable $a holds 10 and variable $b holds 20 then, let’s check following numeric equality operators:

Operator	Description	Example
==	Checks if the values of two operands are equal or not, if yes then condition becomes true.	($a == $b) is not true.
!=	Checks if the values of two operands are equal or not, if values are not equal then condition becomes true.	($a! = $b) is true.
<=>	Checks if the value of two operands are equal or not, and returns -1, 0, or 1 depending on whether the left argument is numerically less than, equal to, or greater than the right argument.	($a <=> $b) returns -1.
>	Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.	($a > $b) is not true.
<	Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.	($a < $b) is true.
>=	Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.	($a >= $b) is not true.
<=	Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.	($a <= $b) is true.

Below is a list of equity operators. Assume variable $a holds "abc" and variable $b holds "xyz" then, let’s check following string equality operators:

Operator	Description	Example
lt	Returns true if the left argument is string wise less than the right argument.	($a lt $b) is true.
gt	Returns true if the left argument is string wise greater than the right argument.	($a gt $b) is false.
le	Returns true if the left argument is string wise less than or equal to the right argument.	($a le $b) is true.
ge	Returns true if the left argument is string wise greater than or equal to the right argument.	($a ge $b) is false.
eq	Returns true if the left argument is string wise equal to the right argument.	($a eq $b) is false.
ne	Returns true if the left argument is string wise not equal to the right argument.	($a ne $b) is true.
cmp	Returns -1, 0, or 1 depending on whether the left argument is string wise less than, equal to, or greater than the right argument.	($a cmp $b) is -1.