Create 190-reverse-bits.js

Author: everthis

190-reverse-bits.js

@@ -0,0 +1,15 @@
+/**
+ * @param {number} n - a positive integer
+ * @return {number} - a positive integer
+ */
+const reverseBits = function(n) {
+  let s = '';
+  let count = 0;
+  let index = 31;
+  while (n > 0) {
+    if (n % 2 !== 0) count += Math.pow(2, index);
+    index--;
+    n = Math.floor(n / 2);
+  }
+  return count;
+};