Accumulators (review)
lCertain arguments of
functions, particularly tail-recursive ones, are often designated as ÒaccumulatorsÓ, e.g.
lThe idea is that this
argument value ÒaccumulatesÓ until the function is ready to return the answer without recursing.
f1(a, n, x) = x <= n ? f1(a*x, n, x+1)
: a;
accumulator
argument