Small fixes + comply with JS standard styles.

Author: lvlte

Bit-Manipulation/IsPowerOfTwo.js

@@ -14,7 +14,7 @@
     And we know that 1's complement is just opp. of that number.
     So, (n & (n-1)) will be 0.
 
-    For eg:    (1000 & (1000-1)) 
+    For eg:    (1000 & (1000-1))
                 1 0 0 0     // Original Number (8)
                 0 1 1 1     // After Subtracting 1 (8-1 = 7)
                 _______
@@ -23,6 +23,8 @@
 */
 
 export const IsPowerOfTwo = (n) => {
-  if (n != 0 && (n & (n - 1)) == 0) return true
-  else return false
+  if (n > 0 && (n & (n - 1)) === 0) {
+    return true
+  }
+  return false
 }

Bit-Manipulation/test/IsPowerOfTwo.test.js

@@ -5,9 +5,9 @@ test('Check if 0 is a power of 2 or not:', () => {
   expect(res).toBe(false)
 })
 
-test('Check if 0 is a power of 2 or not:', () => {
+test('Check if 1 is a power of 2 or not:', () => {
   const res = IsPowerOfTwo(1)
-  expect(res).toBe(false)
+  expect(res).toBe(true)
 })
 
 test('Check if 4 is a power of 2 or not:', () => {