Sender: hhwangpeng (Yandu Chan Tan), letter area: Fortran Title: Re: Urgent Help: What is the fortran step command? Sending station: Nanjing University Small Lily Station (Mon Jul 26 21:14:39 2004) FAC / DFAC (Single / Double Precision) Evaluate The Factorial of The Argument.usageFac (n) argumentsn-argument for Which The Factorial Is Desired. Input) FAC-Function Value (OUTPUT) See the IMSL Library - Http: //bbs1.nju.edu.cn/file/matrix2-7.jpg ※ Source:. Nanjing University small lily station http://bbs.nju.edu.cn [from: 202.119.112.45]