giles
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Newton's method for square root:
let sqrt_newton x =
let g = ref 1.0 in
for _ = 1 to 20 do
g := (!g +. x /. !g) /. 2.0
done;
!g
20 iterations is more than enough to converge for x=2 — result is
~1.414213562. Multiplied by 1000 and int_of_float'd: 1414.
First baseline exercising:
- for _ = 1 to N do ... done (wildcard loop variable)
- pure float arithmetic with +. /.
- the int_of_float truncate-toward-zero fix from iter 117
38 baseline programs total.
11 lines
153 B
OCaml
11 lines
153 B
OCaml
let sqrt_newton x =
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let g = ref 1.0 in
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for _ = 1 to 20 do
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g := (!g +. x /. !g) /. 2.0
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done;
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!g
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;;
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int_of_float (sqrt_newton 2.0 *. 1000.0)
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