IsPowerOf2

Returns true if the given number is a power of 2, false otherwise.

• Use the bitwise binary AND operator (&) to determine if n is a power of 2.
• Additionally, check that n is non-zero.

func IsPowerOf2(n int) bool {
	return n > 0 && (n&(n-1)) == 0
}

IsPowerOf2(0) // false
IsPowerOf2(1) // true
IsPowerOf2(8) // true