Help with understanding a line of code in Scheme R5RS

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Hello! I'm having troubles with what these lines are saying.

(define (accumulate combiner null-value term a next b)

(if (> a b)

null-value

(combiner (term a) (accumulate combiner null-value term (next a) next b)))) <--- THIS LINE

-----------------------------------

(define (accumulate-tr combiner null-value term a next b)

(if (> a b)

null-value

(accumulate-tr combiner (combiner (term a) null-value) term (next a) next b))) <--- THIS LINE

So I'm just confused as to what is happening there's so many variables so many terms I'm kind of overwhelmed. Can anyone dumb it down for :/? Thank you very much!!!!!!!!!

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Cloroxgirl2

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Posted: 3 years ago
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