Driver code
public static void Main ( String [ ] args ) { int test_no = 64 ; if ( isPowerOfFour ( test_no ) ) Console . Write ( test_no + " ▁ is ▁ a ▁ power ▁ of ▁ 4" ) ; else Console . Write ( test_no + " ▁ is ▁ not ▁ a ▁ power ▁ of ▁ 4" ) ; } }