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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();

}

}