Program to find whether a no is power of two | Java Program to find whether a no is power of two ; Function to check if x is power of 2 ; Driver Code
class GFG { static boolean isPowerOfTwo ( int n ) { if ( n == 0 ) return false ; return ( int ) ( Math . ceil ( ( Math . log ( n ) / Math . log ( 2 ) ) ) ) == ( int ) ( Math . floor ( ( ( Math . log ( n ) / Math . log ( 2 ) ) ) ) ) ; } public static void main ( String [ ] args ) { if ( isPowerOfTwo ( 31 ) ) System . out . println ( " Yes " ) ; else System . out . println ( " No " ) ; if ( isPowerOfTwo ( 64 ) ) System . out . println ( " Yes " ) ; else System . out . println ( " No " ) ; } }