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Help  J for C Programmers  
 36. Tacit Programs  There is another language within J, a
microcode for J as it were.  Like Moliere's M. Jourdain, who was
astonished to find he had been speaking prose for forty years
without knowing it, you have been using a small subset of this
language unwittingly throughout our investigations.  The hidden
language describes a way of coding called tacit programming, and
it is time for you to learn it in full.  J's tacit language is
the irreducible essence of a programming language.  It describes
your algorithm using only the ordering of the J primitives you
have already learned.  It has a grammar without words, which you
use to write programs without visible operands; yet its
renouncing these seemingly essential components is self-denial
rather than self-mutilation, for it retains the vigor to express
any