ここにあるドキュメントは古いものです。 より新しいものが別ディレクトリにあります → 5.8.8ベースのperlfaq4 NAME DESCRIPTION Data: Numbers Why am I getting long decimals (eg, 19.9499999999999) instead of the numbers I should be getting (eg, 19.95)? Why isn't my octal data interpreted correctly? Does Perl have a round() function? What about ceil() and floor()? Trig functions? How do I convert bits into ints? Why doesn't & work the way I want