Create 231-power-of-two.js

Author: everthis

231-power-of-two.js

@@ -0,0 +1,16 @@
+/**
+ * @param {number} n
+ * @return {boolean}
+ */
+const isPowerOfTwo = function(n) {
+    let tmp = 0
+    let idx = 0
+    while(tmp <= n) {
+          if((tmp = Math.pow(2, idx)) === n) {
+              return true
+          } else {
+              idx += 1
+          }
+    }
+    return false
+};