Perl sort() function is used to sort the list with or without using a method of sorting in Perl, the sort function is used to sort the array, hashes, list, and subroutine. The sort function is very useful and important to sort the list, array, and hashes. We can specify sort function in the form of subroutine or blocks in Perl, if we have not defined specified block or subroutine then sort function will take default method of sorting. The sort function sorts a list and returns the sorted list as the output to the user.

Below is the syntax of the sort function in Perl is as follows.

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Below is the parameter description syntax of Perl sort function is as follows.

Below is the example of sort function:

The below example shows sort list alphabetically using the sort function. By default sort, the function will sort element of the list with string comparison in ascending order. The below example shows how to sort the list alphabetically are as follows.

Cod

use warnings; use strict; my @sort_list = sort qw(Perl in function sort);      ##Take input from user to sort list. my @sort_list_rev = sort qw(Sort function in perl); print "@sort_list\n";       ## Display sorted result using sorting function. print "@sort_list_rev\n";      ## Display sorted result using sorting function.

Output:

In the above example first time we have sort string name as “Perl in function sort” and the second time we have sort string as “Sort function in Perl”.

In the below example we have used block to sort the order using the sort function. Block will follow the same method of sorting the order as numeric and character.

Code –

use warnings; use strict; # Use block list to sort list using sort function. my @block_sort = sort { $a $b } (10, 2, 5, 4, 3, 7, 6, 8, 9, 1); print "@block_sort\n";

Output:

In the below example we have used subroutine to sort the order using the sort function. To sort the order we have also used subroutine in Perl.

Code

use warnings; use strict; # Use subroutine to sort array in perl. my @numerical_sort = sort compare_sort (22, 11, 34, 13, 39, 67); print "@numerical_sort\n"; sub compare_sort { if($a < $b) { return -1; } elsif($a == $b) { return 0; } else { return 1; } }

Output:

The sort function is very useful and important in Perl to sort list, array, and hashes function. We can specify this function in the form of subroutine or blocks in Perl, if we have not defined specified block or subroutine then sort function will take default method of sorting.

This is a guide to Perl sort(). Here we discuss the introduction to Perl sort() along with the working, appropriate syntax ,parameters and respective examples. You may also look at the following articles to learn more –

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