C#: Calculate the factorial of a given number

C# Sharp For Loop: Exercise-15 with Solution

Write a C# Sharp program to calculate the factorial of a given number.

Visual Presentation:

Sample Solution:

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise15  // Declaration of the Exercise15 class
{  
    public static void Main()  // Main method, entry point of the program
    {
        int i, f = 1, num;  // Declaration of variables 'i' for iteration, 'f' to store factorial, 'num' to store the input number

        Console.Write("\n\n");  // Displaying new lines
        Console.Write("Calculate the factorial of a given number:\n");  // Displaying the purpose of the program
        Console.Write("--------------------------------------------");  // Displaying a separator
        Console.Write("\n\n");

        Console.Write("Input the number : ");  // Prompting the user to input a number
        num = Convert.ToInt32(Console.ReadLine());  // Reading the number entered by the user 

        for (i = 1; i <= num; i++)  // Loop to calculate the factorial of the input number
        {
            f = f * i;  // Multiplying 'f' by 'i' in each iteration to calculate factorial
        }

        Console.Write("The Factorial of {0} is: {1}\n", num, f);  // Displaying the factorial of the entered number
    }
}

Sample Output:

Calculate the factorial of a given number:                                                                    
--------------------------------------------                                             
Input the number : 6                                                                                          
The Factorial of 6 is: 720

Flowchart:

C# Sharp Code Editor:

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