13.3 Features for scientific programming

FWEB contains a few features particularly intended for scientific programming.

1. Several built-in functions generate numerical constants. See ‘$PI’ ($PI) and ‘$E’ ($E).
2. Several built-in functions perform mathematical manipulations. See ‘$EXP’ ($EXP), ‘$POW’ ($POW), ‘$SQRT’ ($SQRT), ‘$LOG’ ($LOG), ‘$LOG10’ ($LOG10), ‘$MAX’ ($MAX), and ‘$MIN’ ($MIN).
3. The do-loop macro ‘$DO’ may be useful. See $DO.
4. C-style array indices can be used by means of the ‘-n)’ option. See -n).
5. An active bracket feature helps improve the appearance of woven code that uses subscripts and/or superscripts heavily. See -W[.