# Program to calculate the value of nCr

#### Program to calculate the value of nCr in c

``` #include<stdio.h> #include<conio.h> int Factorial(int fact); void Calculate_nCr(int n,int r); void main() { int n,r; printf("Enter the value of n \n"); scanf("%d",&n); printf("Enter the value of r \n"); scanf("%d",&r); Calculate_nCr(n,r); getch(); } void Calculate_nCr(int n,int r) { int nCr=Factorial(n)/(Factorial(r)*(Factorial(n-r))); printf("nCr Result = %d",nCr); } int Factorial(int fact) { int total = 1; for (int i = fact; i >= 1; i--) { total *= i; } return total; } ```

#### Output

```Enter the value of n 5 Enter the value of r 2 nCr Result = 10 ```

#### Program to calculate the value of nCr in c++

``` #include<iostream> #include<conio.h> using namespace std; class nCr { public: void Calculate_nCr(int n,int r) { int nCr=Factorial(n)/(Factorial(r)*(Factorial(n-r))); cout<<"nCr Result = "<<nCr; } public: int Factorial(int fact) { int total = 1; for (int i = fact; i >= 1; i--) { total *= i; } return total; } }; void main() { int n,r; cout<<"Enter the value of n \n"; cin>>n; cout<<"Enter the value of r \n"; cin>>r; nCr ncr; ncr.Calculate_nCr(n,r); getch(); } ```

#### Output

```Enter the value of n 5 Enter the value of r 3 nCr Result = 10 ```

#### Program to calculate the value of nCr in c#

``` using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace nCrProject { class nCr { public void Calculate_nCr(int n,int r) { int nCr=Factorial(n)/(Factorial(r)*(Factorial(n-r))); Console.WriteLine("nCr Result = "+nCr); } public int Factorial(int fact) { int total = 1; for (int i = fact; i >= 1; i--) { total *= i; } return total; } static void Main(string[] args) { Console.WriteLine("Enter the value of n"); int n = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("Enter the value of r"); int r = Convert.ToInt32(Console.ReadLine()); nCr ncr = new nCr(); ncr.Calculate_nCr(n, r); Console.ReadLine(); } } } ```

#### Output

```Enter the value of n 6 Enter the value of r 2 nCr Result = 15 ```

#### Program to calculate the value of nCr in java

``` import java.util.*; class nCr { public void Calculate_nCr(int n,int r) { int nCr=Factorial(n)/(Factorial(r)*(Factorial(n-r))); System.out.println("nCr Result = "+nCr); } public int Factorial(int fact) { int total = 1; for (int i = fact; i >= 1; i--) { total *= i; } return total; } } class examples { public static void main(String[] args) { nCr ncr=new nCr(); 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(); ncr.Calculate_nCr(n, r); } } ```

#### Output

```Enter the value of n 7 Enter the value of r 3 nCr Result = 35 ```

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