Perl Special Variables

Special variables are predefined having special meaning in perl. The special variables in perl, uses punctuation characters after the usual variable indicator using dollar ($), at (@), or percent (%) sign, like $_.

Perl Special Variable Example

The most commonly used special variable in perl is $_, contains the default input and pattern-searching string. Here is an example using special variable $_ in perl:

#!/usr/bin/perl

foreach ('Deepak','Rajat','Ritesh')
{
   print($_);
   print("\n");
}

When the above code is executed, it will produce the following output:

Deepak
Rajat
Ritesh

Perl Special Variable Types

There are the following types of special variables available in perl:

• Regular Expression Special Variables
• Filehandle Special Variables
• Global Scalar Special Variables
• Global Hash Special Variables
• Global Array Special Variables
• Global Special Constants
• Global Special Filehandles

Perl Global Scalar Special Variables

Here the following table lists all the scalar special variables available in perl.

Perl Global Array Special Variables

Here, the following table lists the global array special variables available in perl:

Perl Global Hash Special Variables

Here, the following table lists the global hash special variables available in perl:

Perl Global Special Filehandles

Here, the following table lists the global special filehandles available in perl:

Perl Regular Expression Special Variables

Here the table given below, lists the regular expression special variables available in perl:

Perl Filehandle Special Variables

Here the following table lists the filehandle special variables available in perl:

Perl Online Test