30-seconds-of-code/snippets/js/s/is-power-of-two.md

title, type, language, tags, author, cover, dateModified

title	type	language	tags	author	cover	dateModified
Number is power of two	snippet	javascript	math	chalarangelo	flower-portrait-10	2020-10-20T23:02:01+03:00

Checks if the given number is a power of 2.

• Use the bitwise binary AND operator (&) to determine if n is a power of 2.
• Additionally, check that n is not falsy.

const isPowerOfTwo = n => !!n && (n & (n - 1)) == 0;

isPowerOfTwo(0); // false
isPowerOfTwo(1); // true
isPowerOfTwo(8); // true