Add code and tests for checking power of 2

Author: Aayushi-Mittal

Bit-Manipulation/IsPowerOfTwo.js

@@ -0,0 +1,17 @@
+/*
+    author: @Aayushi-Mittal
+
+    This script will check whether the given
+    number is a power of two or not.
+
+*/
+
+export const IsPowerOfTwo = (n) => {
+    if ((n&(n-1))==0 && n!=0)
+        return true;
+    else
+        return false;
+}
+  
+// console.log(IsPowerOfTwo(0));
+  

Bit-Manipulation/test/IsPowerOfTwo.test.js

@@ -0,0 +1,21 @@
+import {IsPowerOfTwo} from '../IsPowerOfTwo'
+
+test('Check if 0 is a power of 2 or not:', () => {
+  const res = IsPowerOfTwo(1, 0)
+  expect(res).toBe(false)
+})
+
+test('Check if 4 is a power of 2 or not:', () => {
+  const res = IsPowerOfTwo(4)
+  expect(res).toBe(true)
+})
+
+test('Check if 1024 is a power of 2 or not:', () => {
+  const res = IsPowerOfTwo(1024)
+  expect(res).toBe(true)
+})
+
+test('Check if 1025 is a power of 2 or not:', () => {
+  const res = IsPowerOfTwo(1025)
+  expect(res).toBe(false)
+})