1GENERAL: functions - system functions

The following functions can be used in FORTRAN-77 expressions in addition 
to the standard FORTRAN-77 intrinsic functions or anywhere on the command
line in the form $<function>(<parameter>,<parameter>,...) if there are
parameters or in the form $<function> without parameters. In the alpha-
betical list below, k, k1, k2,... denote integer expressions, s denotes
a character expression. 
 
function  result   description
--------  -------  ------------------------------------------------------
pi        real     3.141592654...
