package MathPrograms; import MathPrograms.Factorial; import java.util.Scanner; public class nCr { public static double permutation(int n, int r) { int a, b, c; a = Factorial.fact(n); b = Factorial.fact(r); c = Factorial.fact(n - r); return (double) a / ((double) (b * c)); } public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter the value of 'n': "); int n = sc.nextInt(); System.out.println("Enter the value of 'r': "); int r = sc.nextInt(); double result; if (n >= r) { result = permutation(n, r); System.out.println("nCr of given inputs: " + result); } else { System.out.println("N should not be greater than R. "); } sc.close(); } }