Question

SHOW SCREEN SHOTS OF THE INPUT AND OUTPUT AS WELL AS THE RESULTS

PROGRAMMING IN PERL

Task 2: Variables

2.1 Scalar Variables

A scalar is a single unit of data. That data might be an integer number, floating point, a character, a string, a paragraph, or an entire web page. Simply saying it could be anything, but only a single thing.

#!/usr/bin/perl

$age = 35; # An integer assignment

$name = "Gary Mann"; # A string

$salary = 5445.50; # A floating point

print "Age = $age\n";

print "Name = $name\n";

print "Salary = $salary\n";

Output__________________

2.2 Array Variables

An array is a variable that stores an ordered list of scalar values. 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.

#!/usr/bin/perl

@ages = (25, 30, 40);

@names = ("John Paul", "Lisa", "Kumar");

print "\$ages[0] = $ages[0]\n";

print "\$ages[1] = $ages[1]\n";

print "\$ages[2] = $ages[2]\n";

print "\$names[0] = $names[0]\n";

print "\$names[1] = $names[1]\n";

print "\$names[2] = $names[2]\n";

Output______________________

2.3 Hash Variables

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 followed by the "key" associated with the value in curly brackets.

#!/usr/bin/perl

%data = ('John Paul', 45, 'Lisa', 30, 'Kumar', 40);

print "\$data{'John Paul'} = $data{'John Paul'}\n";

print "\$data{'Lisa'} = $data{'Lisa'}\n";

print "\$data{'Kumar'} = $data{'Kumar'}\n";

Answer 1

Screen shots of the above codes

2.1

2.2

2.3