Q:

C# program to calculate the NCR

belongs to collection: C# Basic Programs | basics

mahmoud2506
Save to bookmark
|
2022-05-09
|
  225 
0
NCR =  n!/(r!)*(n-r)! ;

 

c# programming, exam questions, c# programming exam-questions,
login and add your own answer to this question

All Answers

mahmoud2506
2022-05-09
need an explanation for this answer? contact us directly to get an explanation for this answer

Program:

The source code to calculate the NCR is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to calculate the NCR.

using System;

class Ncr
{
    static int CalculateFactorial(int num)
    {
        int fact = 1;

        for (int i = 2; i <= num; i++)
        {
            fact = fact * i;
        }

        return fact;
    }

    static int CalculateNcr(int n, int r)
    {
        int ncr = 0;
        int fact1 = 0;
        int fact2 = 0;
        int fact3 = 0;

        fact1 = CalculateFactorial(n);
        fact2 = CalculateFactorial(r);
        fact3 = CalculateFactorial(n - r);

        ncr = fact1 / (fact2*fact3);

        return ncr;
    }
    static void Main(string[] args)
    {
        int ncr = 0;
        int n = 0;
        int r = 0;

        Console.Write("Enter the value of 'n': ");
        n = int.Parse(Console.ReadLine());

        Console.Write("Enter the value of 'r': ");
        r = int.Parse(Console.ReadLine());

        ncr = CalculateNcr(n, r);

        Console.WriteLine("Ncr: " + ncr);
    }
}

Output:

Enter the value of 'n': 7
Enter the value of 'r': 5
Ncr: 21
Press any key to continue . . .

Explanation:

Here, we created a class Ncr that contains three static methods CalculateFactorial(), CalculateNcr(), and Main() method.

The CalculateFactorial() is used to calculate the factorial of the specified factorial and return to the calling method.

The CalculateNcr() is used to calculate the Ncr using the below formula.

NCR =  n!/(r!)*(n-r)! ;

The Main() method is the entry point for the program, Here we read the value of n and r and called the CalculateNcr() method that will return NCR that will be printed on the console screen.

 

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

C# Basic Programs | basics
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
<< C# program to calculate the perimeter of Rectangle...