The error was in the test and a variable being empty in the comparison. My code is working fine now. I did come across this though and wondered why:

my $var = 23123412341234.01222222;

print "var=$var\n";
if(int($var) != $var){
    print "is a float\n";
}
else{
    print "not a float\n";
}
[download]

Prints this:

var=23123412341234
is a float
[download]

The test is always working for me, so that is a good confirmation. However, I was wondering why it prints the integer before the int() function touches the variable?