use strict;
use warnings;

while(<DATA>) {
    print if /IT/
}
__DATA__
This is IT for now
Nothing of interest here
Looping is used for ITeration

##</code><code>##

This is IT for now
Looping is used for ITeration

##</code><code>##

while(<DATA>) {
    print if /\bIT\b/
}

##</code><code>##

This is IT for now