abs - absolute value
value abs -> value
-3 abs -> 3
3 abs -> 3
-3.456 abs -> 3.456
implemented by C/C++
long labs(long) and
double fabs(double)
Alternatives: Functions abs_i for integers, abs_d for doubles
(SeeAlso) -> behaviour and synopsis are the same.
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 660, p 661
Diesmann, docu by Sirko Straube
27.4.1999
/var/www/debian/nest/nest-simulator-2.20.0/lib/sli/typeinit.sli