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TABLE 30.2 Perl Compound Operators
Meaning Operator
Logical AND &&
Logical OR ;;
Logical NOT !
Group these compound statements ()
Arithmetic operators can be used to perform all sorts of mathematical operations on variables.
These are listed in Table 30.3.
Perl Programming 615
30
TABLE 30.3 Perl Arithmetic Operators
Meaning Operator
Raises x to the y power x**y
Calculates the remainder of x/y x%y
Adds x to y x+y
Subtracts y from x x-y
Multiplies x times y x*y
Divides x by y x/y
Negates y -y
Increments y by 1 and uses value ++y
Uses value of y and then increments by 1 y++
Decrements y by 1 and uses value ??”y
Uses value of y and then decrements by 1 y++
Assigns value of y to x x=y
Regular Expressions
Many Linux applications use regular expressions to simplify searches. In Perl, regular
expressions have been taken to the level of an art form.
Statements with regular expressions use several of the same symbols that wildcards and
operators use, but for slightly different reasons. Regular expressions use symbols to match
patterns in text.


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