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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[.