Jensen's Device

editable example

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ghul

use IO.Std.write_line

let i mut = 0

let sum = (low: int, high: int, term: () -> double) -> double => (

let total mut = 0.0D

i = low

while i <= high do

total = total + term()

i = i + 1

od

total

)

write_line("{sum(1, 100, () => 1.0D / cast double(i))}")

5.187377517639621