1 /* Copyright (c) 1979 Regents of the University of California */ 2 3 static char sccsid[] = "@(#)LN.c 1.2 11/20/80"; 4 5 #include "h01errs.h" 6 7 double 8 LN(value) 9 10 double value; 11 { 12 if (value <= 0) { 13 ERROR(ELN, value); 14 return; 15 } 16 return log(value); 17 } 18