I came across a very odd situation and was hoping a fellow monk could clarify as why it happened/
I have a small snippet of code that compares numbers. It has worked fine for some time without problem until -2.97 came along.

I try to compare two numbers. The one way works as expected but the other does not. 

my $batch_total = 297;
my $batch_sign_indicator = '-';
my $close_response;
$close_response->{batch_net_amount} = -2.97;


#this code doesn't work. it returns false

my $test_batch_amount = ($batch_sign_indicator eq '-') ? ((0 - $batch_
+total) / 100) : ($batch_total / 100);



if($test_batch_amount == $close_response->{batch_net_amount}){
    print "good!!! $test_batch_amount == $close_response->{batch_net_a
+mount}";    
}
else{
    print "no good $test_batch_amount == $close_response->{batch_net_a
+mount}";
}

####THIS CODE DOES WORK AS EXPECTED AND RETURNS TRUE

my $test_batch_amount = ($batch_sign_indicator eq '-') ? ((0 - $batch_
+total)) : ($batch_total); 

if($test_batch_amount == ($close_response->{batch_net_amount}*100)){ 
   print "good!!! $test_batch_amount == $close_response->{batch_net_am
+ount}";      
} 
else{ 
   print "no good $test_batch_amount == $close_response->{batch_net_am
+ount}"; 
}

[download]
Why?? Thanks again.

In reply to inequality of appearing same number by bear0053

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