abs_i - absolute value of integer
integer abs -> integer
-3 abs_i -> 3
implemented by C/C++
long labs(long) and
If you are not sure, if the value is of type double or integer, use
abs. If e.g. abs_d gets an integer as argument, NEST will exit throwing an
assertion.
Stroustrup 3rd ed p 661
Diesmann
27.4.1999
/var/www/debian/nest/nest-simulator-2.20.0/sli/slimath.cc