Is int even?

gistfile1.pde

// quickly find out if an int is even or uneven with:
// (i & 1) == 0
// ... which "extracts" the last bit.
 
for ( int i = 0; i < 10; i++ )
    println( i + " " + (i & 1) + ( (i & 1) == 0 ? " even" : " uneven" ) );