# Number is power of two

JavaScript, Math · Oct 20, 2020

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