compare 2 text files

i need to compare 2 text files and find data in file2 that no present in text file1.
problem how find diffirences between files.
i start write in perl:

#!/usr/bin/perl -w
open(SALES,"text1.txt");
open(SALES2,"text2.txt");

while (($line= <SALES>)&&($line2= <SALES2>))

{
print $line2;
}
close SALES;

 

Where is your files, can i see these anyway?

 

There are several Perl modules that do comparisons. Check CPAN.

 

There are tools available for doing it... I wonder why you need a code to compare it.

A sample code Synopses

	use File::Compare;
	if (compare("file1","file2") == 0) {
	    print "They're equal\n";
	}

Code (markup):

 

try it on if else condition or String functions( Concatenate, Compare, Upper Case, Lower Case)