Monte Carlo methods: Difference between revisions

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 =={{header|JavaScript}}==
+===ES5===
 <lang JavaScript>function mcpi(n) {
     var x, y, m = 0;
@@ Line 949: / Line 950: @@
 .1417656
 </pre>
+===ES6===
+<lang JavaScript>(() => {
+    'use strict';
+    // monteCarloPi :: Int -> Float
+    const monteCarloPi = n => {
+        const rnd = Math.random;
+        return 4 * range(1, n)
+            .reduce(a => {
+                const [x, y] = [rnd(), rnd()];
+                return x * x + y * y < 1 ? a + 1 : a;
+            }, 0) / n;
+    }
+    // range :: Int -> Int -> [Int]
+    const range = (m, n) =>
+        Array.from({
+            length: Math.floor(n - m) + 1
+        }, (_, i) => m + i);
+    // TEST
+    return [1, 2, 3, 4, 5]
+        .map(_ => monteCarloPi(10000000));
+    // e.g. -> [3.141368, 3.1408992, 3.1412084, 3.142132, 3.1413012]
+})();</lang>
+{{Out}} (5 sample runs)
+<lang JavaScript>[3.141368, 3.1408992, 3.1412084, 3.142132, 3.1413012]</lang>
 =={{header|Julia}}==