Data update

Task/Isqrt-integer-square-root-of-X/JavaScript/isqrt-integer-square-root-of-x.js

@@ -0,0 +1,36 @@
+function isqrt(x) {
+    let q = 1n;
+    while (q <= x) {
+        q *= 4n;
+    }
+
+    let z = x;
+    let r = 0n;
+
+    while (q > 1) {
+        q /= 4n;
+        let t = z - r - q;
+        r /= 2n;
+
+        if (t >= 0) {
+            z = t;
+            r += q;
+        }
+    }
+    return r;
+}
+
+const items = [];
+for (let n = 0; n < 66; n++) {
+    items.push(isqrt(BigInt(n)));
+}
+
+console.log(items.join(" "));
+
+const items2 = [];
+
+for (let n = 1n; n < 204n; n+= 2n) {
+    items2.push(`${Intl.NumberFormat().format(isqrt(7n ** n))} = isqrt(7^${n})`);
+}
+
+console.log(items2.join('\n'));