categorized answer QandAEditors Different rounding schema: <code> # 1.1 => 1; 1.9 => 1; -1.1 => -2; -1.9 => -2 $rounded = POSIX::floor($value); # 1.1 => 2; 1.9 => 2; -1.1 => -1; -1.9 => -1 $rounded = POSIX::ceil($value); # 1.1 => 1; 1.9 => 2; -1.1 => -1; -1.9 => -2 $rounded = round($value); sub round { $_[0] > 0 ? int($_[0] + .5) : -int(-$_[0] + .5) } </code> 24335