And, Or, Equal, Not Equal, Greater Than, Less Than in Perl

Plain Speak / Code
and  /  &&
or  /  ||
equals (string)  /  eq
equals (numeric)  /  ==
not equal (string)  /  ne
not equals (numeric)  /  !=
greater than  /  >
less than  /  <
greater than or equal to  /  >=
less than or equal to  /  <=



To match or not match more than one condition:

$ko=3;
$ji="Happy times";

if ($ko < 5 && $ko > 1) { print "YES"; }
- AND && - prints YES because $ko meets both requirements.

if ($ko < 5 || $ko > 10) { print "YES"; }
- OR || - prints YES because $ko matches the first requirement.

if ($ji eq "Happy times") { print "YES"; }
- EQUALS (STRING) eq - prints YES because the string $ji is an exact match.

if ($ko == 3) { print "YES"; }
- EQUALS (NUMBER) == - prints YES because $ko is an exact match.

if ($ji ne "Happy go lucky") { print "YES"; }
- NOT EQUAL (STRING) ne - prints YES because the string $ji doesn't match.

if ($ko != 4) { print "YES"; }
- NOT EQUAL (NUMBER) != - prints YES because $ko isn't equal.

if ($ko >= 3) { print "YES"; }
- GREATER THAN OR EQUAL TO >= - prints YES because $ko is equal or greater.

if ($ko <= 3) { print "YES"; }
- LESS THAN OR EQUAL TO <= - prints YES because $ko is equal or less.



Copy and Paste Perl Code:

#!/usr/bin/perl

print "Content-type:text/html\n\n";

$ko=3;
$ji="Happy times";

if ($ko < 5 && $ko > 1) { print "YES"; }
if ($ko < 5 || $ko > 10) { print "YES"; }
if ($ji eq "Happy times") { print "YES"; }
if ($ko == 3) { print "YES"; }
if ($ji ne "Happy go lucky") { print "YES"; }
if ($ko != 4) { print "YES"; }
if ($ko >= 3) { print "YES"; }
if ($ko <= 3) { print "YES"; }

exit;



Resources:
If, Elsif, and Else in Perl


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