Perl Operators

 

    = Addition =

    Perls set of operators borrows abundantly from the C programming language. A few of Cs operators dont create faculty for perl and were omitted. Some operators were adopted from additional languages, and some were invented for perl.

    = The Operators =

    Most addition operators are bifold operators; this agency they yield two arguments. Unary operators alone yield one argument.

    The basal addition operators are present: accession (+), addition (-), multiplication (

    The modulus abettor is %. Modulus allotment the butt of a analysis operation.

     book 4 % 3; # prints 1 -- 3 goes into 4, 1 time with 1 larboard over.

     book 4 % 2; # prints 0 -- 2 goes into 4, 2 times with 0 larboard over.

    The exponentiation abettor is power of 2 should acknowledgment 2 (( 2

     book 4 book 2

    The auto-decrement (--) abettor is a unary operator. It decrements a after amount by one. It can be acclimated two ways. The first way allotment the amount of the capricious afore it was decremented, and the additional way allotment the amount of the capricious afterwards it was decremented.

     $foo = 1;

     book $foo--; # column cutback -- $foo is printed and then

     # decremented to 0.

     book --$foo; # pre cutback -- $foo is decremented to -1 and

     # then printed.

    The auto-increment (++) abettor is a unary operator. It increments a after amount or a cord value. It aswell can be acclimated two ways.

     $foo = 1;

     book $foo++; # column accession -- $foo is printed and then

     # incremented to 2.

     book ++$foo; # pre accession -- $foo is incremented to 3 and

     # then printed.

     $foo = a09;

     book $foo++; # column accession -- $foo is printed and then

     # incremented to a10.

     book ++$foo; # pre accession -- $foo is incremented to a11

     # and then printed.

     $foo = a;

     book $foo++; # column accession -- $foo is printed and then

     # incremented to b.

     book ++$foo; # pre accession -- $foo is incremented to c and

     # then printed.

    The basal appointment abettor is = which sets the amount on the larboard ancillary to be according to the amount on the appropriate side. It aswell allotment the value. Appropriately you can do things like $a = 5 + ($b = 6), which will set $b to a amount of 6 and $a to a amount of 11 (5 + 6). Why you would wish to do this is addition question.

    The appointment amend operators from C, +=, -=, etc. plan in perl. perl expands on this basal abstraction to beset alotof of the bifold operators in perl.

    Perl uses altered operators to analyze amount and to analyze strings. This is done because in alotof cases, perl will appropriately catechumen numbers to strings and vice-versa. In alotof cases this helps, but not with comparisons.

    For numbers, the operators are:

     book I like cookies ;

     }

     #Using brackets, the adjustment is create added clear.

     #This codicillary acts in the aforementioned way as the last.

     if($a 5 && $b 3)

     #Equivalent and easier to accept with brackets

     if(($a 2) or $c 4 is false, there is no charge to appraise $b < 3

     #because the codicillary is automatically false

     if($a Bitwise Cord book Analysis Additional Precedence==

    Precedence is a abstraction that will be accepted to you if you accept advised algebra or coded in C/C++. Anniversary abettor has its abode in a bureaucracy of operators, and are accomplished in order. The antecedence of perl operators is austere and should be overriden with parentheses, both if you are advisedly traveling adjoin antecedence and if you arent abiding of the adjustment of precedence. For a complete advertisement of the order, analysis [http://www.perl.com/doc/manual/html/pod/perlop.html#SYNOPSIS perlop].