Hi guys,

I think this is a basic question. I'm not very familiar with this.

I'm trying to round a number up and round a number down. From what I have read this can be done using POSIX. I have tried to to use this, but i'm getting errors:

sub findGridBounds($$$%)
{
    use POSIX;
    my ($searchValue, $key, $gridTableKey, %gridTable) = @_;
    
    if (exists $gridTable{ $key })                                
    {
        my $inc = ($gridTable{$gridTableKey}[1] - $gridTable{$gridTableKey}[0]) / 501;
        my $mid = (($searchValue - $gridTable{$gridTableKey}[0]) / $inc) + 1;
        
        
        my $gridUpper = ceil($mid);
        my $gridLower = floor($mid);    
        print "Upper is: $gridUpper Lower is: $gridLower\n";

    }

}

Global symbol "$gridUpper" requires explicit package name
Global symbol "$gridLower" requires explicit package name