squareRoot.js

amit265 · amit265 · commit cf31916bd0a5 · 2026-01-26T23:15:26.000+05:30
diff --git a/javascript/3_math-programs/squareRoot.js b/javascript/3_math-programs/squareRoot.js
@@ -0,0 +1,49 @@
+// 2. Find the Square Root
+
+function squareRoot(n) {
+  return Math.sqrt(n);
+}
+console.log(squareRoot(144));
+
+const squareRootUsingPow = (n) => Math.pow(n, 1 / 2);
+
+console.log(squareRootUsingPow(169));
+
+//Using Binary Search
+
+function findSqrt(number) {
+  let start = 0,
+    end = number,
+    mid,
+    ans;
+
+  while (start < end) {
+    mid = Math.floor((start + end) / 2);
+
+    if (mid * mid === number) {
+      ans = mid;
+      break;
+    }
+
+    if (mid * mid < number) {
+      ans = start;
+      start = mid + 1;
+    } else {
+      end = mid - 1;
+    }
+  }
+
+  let increment = 0.1;
+
+  for (let i = 0; i < 5; i++) {
+    while (ans * ans <= number) {
+      ans += increment;
+    }
+    ans = ans - increment;
+    increment = increment / 10;
+  }
+  return ans;
+}
+
+
+console.log(findSqrt(256));
