Low Level Bit Hacks You Absolutely Must Know

You're viewing a comment by hydraurlz and its responses.

July 01, 2009, 15:58

check if a number is power of 2

if ( ( n && ( n-1 ) ) == 0 )
{
//power of 2
}
else
{
//not power of 2
}

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Tom Kha Gai Permalink
October 20, 2010, 16:40

FIX: && => &

Additionally: can also be written as

(n & (-n)) == n

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