## Thursday, 20 July 2017

### Simple program

Simple program #10 (Source code to calculate factorial of a number)

Enter a number: 5
Factorial of 5 is: 120

The program is written in C# programming language and will accept a number as input. The logic of the program is to find factorial of the input operator.

 Simple program

Note: If you are new to C# and Console Application. Try to code First C# Program

Note: Read articles on how to use Loops and Conditions.

Let’s find out a simple and easy way to code the program.

Practical Implementation:

using System;

namespace patternProblem.Simple_program
{
class Simple10   //factorial of a number
{
static void Main(string[] args)
{
Console.Write("Enter a number: ");
int n = Convert.ToInt32(Console.ReadLine());
int factorial = 1;

if (n >= 0)
{
for (int i = n; i > 1; i--)
{
factorial = factorial * i;
}
Console.WriteLine("Factorial of {0} is: {1}", n, factorial);
}
else
{
Console.WriteLine("Factorial is -ve number is not possible");
}
Console.ReadKey();
}
}
}

Output:
The input number is 5. The program will do find factorial of the input operator. The output is shown below:

Enter a number: 5
Factorial of 5 is: 120
Press any key to continue . . .

For any query, comment us below.

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