Find whether a given number is a power of 4 or not | Java program to check if given number is power of 4 or not ; Driver Code
import java . io . * ; class GFG { static boolean isPowerOfFour ( int n ) { return n != 0 && ( ( n & ( n - 1 ) ) == 0 ) && ( n & 0xAAAAAAAA ) == 0 ; } public static void main ( String [ ] args ) { int test_no = 64 ; if ( isPowerOfFour ( test_no ) ) System . out . println ( test_no + " ▁ is ▁ a ▁ power ▁ of ▁ 4" ) ; else System . out . println ( test_no + " ▁ is ▁ not ▁ a ▁ power ▁ of ▁ 4" ) ; } }