1 /* Copyright (c) 1979 Regents of the University of California */ 2 3 static char sccsid[] = "@(#)LN.c 1.5 01/09/89"; 4 5 #include <math.h> 6 7 double 8 LN(value) 9 10 double value; 11 { 12 if (value <= 0) { 13 ERROR("Non-positive argument of %e to ln\n", value); 14 } 15 return log(value); 16 } 17