How do I view a hash element in Perl?

To access single element of hash, ($) sign is used before the variable name. And then key element is written inside {} braces.

How do I print a value in Perl?

In any real-world Perl script you’ll need to print the value of your Perl variables. To print a variable as part of a a string, just use the Perl printing syntax as shown in this example: $name = ‘Alvin’; print “Hello, world, from $name.

How do I reference a hash in Perl?

Similar to the array, Perl hash can also be referenced by placing the ‘\’ character in front of the hash. The general form of referencing a hash is shown below. %author = ( ‘name’ => “Harsha”, ‘designation’ => “Manager” ); $hash_ref = \%author; This can be de-referenced to access the values as shown below.

What is hash in Perl script?

A hash is a set of key/value pairs. Hash variables are preceded by a percent (%) sign. To refer to a single element of a hash, you will use the hash variable name preceded by a “$” sign and followed by the “key” associated with the value in curly brackets..

How do I return a hash in Perl?

$hash{key} is a single element within the hash. Therefore, \%hash is a reference to %hash , i.e., the whole hash, which appears to be what you intend to return in this case. \$hash{key} is a reference to a single element.

How do I print a character in Perl?

my $var = “\\n”; $var =~s/\\//g; print “$'”; Else If you want print the \n . Just use the single quotes instead of double quotes. or use forward slashes within double quotes.

How do I print an array of contents in Perl?

Use join() #!/usr/bin/perl my @arr = (1, 20, ‘asdf’, 100); print join(‘, ‘, @arr); We have identified an array @arr in which is placed a few numbers and a string, and then using join(‘, ‘, @arr) we have created a string and using print brought it to the screen. The result of this code: 1, 20, asdf, 100 .

How do you reference hash?

Hash References To get a hash reference, use the {key=>value} syntax instead, or prefix your variable name with a backslash like: %hash. Dereference a hash with %$hashref, with the $arrayref->{key} arrow for value references, or the %{array_ref_expression} syntax.

How do I initialize a hash in Perl?

Consider the following code: #!/usr/bin/perl use Data::Dumper; my %hash = (); $hash{currency_symbol} = ‘BRL’; $hash{currency_name} = ‘Real’; print Dumper(%hash);