perl variables

Perl Variables

In Perl, variables are used to store and manipulate data. They can hold various types of data, such as numbers, strings, arrays, and hashes. Perl variable names start with a sigil, which is a special character indicating the variable's type. The sigils include $ for scalars, @ for arrays, and % for hashes. Variables in Perl are dynamically typed, meaning they can hold values of different types at different times.

To declare a variable in Perl, you simply use the my keyword followed by the variable name and optionally the initial value. For example:

my $name = "John";
my @numbers = (1, 2, 3, 4, 5);
my %person = ('name' => 'John', 'age' => 30);

Perl also has special variables, such as $_, which is the default variable for many operations, and @_, which is used to access the arguments passed to a subroutine.

Variables can be interpolated in double-quoted strings, allowing their values to be inserted directly into the string. For example:

my $age = 30;
print "The person's age is $age years old.";

Understanding Perl variables is essential for effective programming in Perl, as they form the basis for data manipulation and storage.

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