Scripting Languages [ Lab Programs ]

implement the list of manipulating functions

Aim:

☛ Write a Perl program to implement the following list of manipulating functions
a) Shift
b) Unshift
c) Push.

Solution :

PROGRAM: (list_functions.pl)

 
#!/usr/bin/perl
use strict;
use warnings;

# Initial list
my @numbers = (10, 20, 30, 40);

print "Original list: @numbers\n";

# a) Shift - removes first element
my $shifted = shift @numbers;
print "After shift (removed $shifted): @numbers\n";

# b) Unshift - adds element at beginning
unshift @numbers, 5;
print "After unshift (added 5 at beginning): @numbers\n";

# c) Push - adds element at end
push @numbers, 50;
print "After push (added 50 at end): @numbers\n";

OUTPUT:

 
Original list: 10 20 30 40
After shift (removed 10): 20 30 40
After unshift (added 5 at beginning): 5 20 30 40
After push (added 50 at end): 5 20 30 40 50

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