text: Power of a prime number ‘ r ’ in n ! | Java program to find power of a prime number ' r ' in n ! ; Function to return power of a no . ' r ' in factorial of n ; Keep dividing n by powers of ' r ' and update count ; Driver code
code: class GFG { static int power ( int n , int r ) { int count = 0 ; for ( int i = r ; ( n / i ) >= 1 ; i = i * r ) count += n / i ; return count ; } public static void main ( String [ ] args ) { int n = 6 , r = 3 ; System . out . print ( power ( n , r ) ) ; } }