PS_00_Exercise Hello_World_0

Perl : (Practical Extraction Reporting Language)

It is a powerful language for text manipulation and system administration.

It is modular, it supports procedures, object orientation, it can parse text.

# touch helloworld.pl

# vi helloworld.pl

#!/usr/bin/perl -w

# Author: Arjun Shrinivas

# Date: 27.10.2013

# Purpose: Echoes Hello World.

print "Hello World\n";

#END

:wq

Now here's some explanation (in case you need any):

1. The string is enclosed in double-quotes(" ... ") because that's how string constants are represented in perl.

2. \n is a special character that is called "newline". When you print a newline you will see that your output started on a new line.

3. The semi-colon (;) at the end indicates that this is the end of a perl command. Every perl command should be terminated with a semicolon.

"The content which is placed with in double quotes will be printed explicitly."

The output for "Hello World\n"; will be

# perl -w helloworld.pl

Hello World

#

'The content which is placed with in single quotes will be printed literally than explicitly.'

The output for 'Hello World\n'; will be

# perl -w helloworld.pl

Hello World\n#