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| let integral f a b = | |
| let n = 10000.0 in | |
| let delta = (b -. a) /. n in | |
| let rec approx f a b i sum = | |
| if i > n then sum else (approx f) a b (i +. 1.0) (sum +. (((f(a +. (i -. 1.0) *. delta) +. f(a +. i *. delta)) *. delta) /. 2.0)) in | |
| (approx f) a b 1.0 0.0 | |
| integral sin 0.0 3.14159265359 |
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