To access a single element of a Perl array, use ($) sign before variable name. You can assume that $ sign represents singular value and @ sign represents plural values. Variable name will be followed by square brackets with index number inside it. Indexing will start with 0 from left side and with -1 from right side.

How do you access each element of an array in Perl?

To access a single element of a Perl array, use ($) sign before variable name. You can assume that $ sign represents singular value and @ sign represents plural values. Variable name will be followed by square brackets with index number inside it. Indexing will start with 0 from left side and with -1 from right side.

How do I iterate through an array in Perl?

Best way to iterate through a Perl array

1. foreach (@Array) { SubRoutine($_); }
2. while($Element=shift(@Array)) { SubRoutine($Element); }
3. while(scalar(@Array) !=0) { $Element=shift(@Array); SubRoutine($Element); }
4. for my $i (0 .. $#Array) { SubRoutine($Array[$i]); }
5. map { SubRoutine($_) } @Array ;

How get key from hash value in Perl?

Extracting Keys and Values from a Hash variable The list of all the keys from a hash is provided by the keys function, in the syntax: keys %hashname . The list of all the values from a hash is provided by the values function, in the syntax: values %hashname . Both the keys and values function return an array.

How do I iterate through a hash in Perl?

Perl allows to Loop over its Hash values. It means the hash is iterative type and one can iterate over its keys and values using ‘for’ loop and ‘while’ loop. In Perl, hash data structure is provided by the keys() function similar to the one present in Python programming language.

What is associative array in Perl?

Associative arrays are a very useful and commonly used feature of Perl. Associative arrays basically store tables of information where the lookup is the right hand key (usually a string) to an associated scalar value. Again scalar values can be mixed “types”.

How do I assign a value to an array in Perl?

Array variables are preceded by an “at” (@) sign. To refer to a single element of an array, you will use the dollar sign ($) with the variable name followed by the index of the element in square brackets. In Perl, List and Array terms are often used as if they’re interchangeable.