Program to find whether a no is power of two | Function to check if x is power of 2 ; Driver Code
function isPowerOfTwo ( n ) { if ( n == 0 ) return 0 ; while ( n != 1 ) { if ( n % 2 != 0 ) return 0 ; n = n / 2 ; } return 1 ; } isPowerOfTwo ( 31 ) ? document . write ( " " + " " ) : document . write ( " " + " " ) ; isPowerOfTwo ( 64 ) ? document . write ( " " ) : document . write ( " " ) ;