Thank you very very much sir. Solved it in 5seconds. Actually it was a mistake by me. New to this programming thing. Thank you again. This made everything OK

#!/usr/bin/perl
print "Enter a number\n";
chomp($a=<stdin>);
print "Enter second number\n";
chomp($b=<stdin>);
print "Enter third number\n";
chomp($c=<stdin>);
$big=0;
$equal=0;
if($a == $b){
$big = $a;
$equal = $a;
}
elsif($a > $b){
$big=$a;
}
else{
$big = $b;
}
if($equal == $c){
print "All numbers are same";
}
elsif($big < $c){
$big = $c;
print "The biggest number is $big \n";
}
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