reduce
builtin-function
(reduce reducer seq)
(reduce reducer seed seq)
Returns the accumulated result of repeatly calling the function reducer
on each element of seq. reducer is a function with two parameters.
The first argument is the result so far, the second argument is the current
element of seq.
make-html > (reduce + (series 10))
it: 55
make-html > (reduce + 100 (series 10))
it: 155