Factorial Calculator

This is a simple C program that calculates the factorial of a given non-negative integer.

Features

• Calculates the factorial of a number entered by the user.
• Handles input validation for non-negative integers.
• Allows the user to retry with a new input if desired.

Requirements

• C compiler (e.g., GCC, Clang)

Usage

1. Clone the repository or download the source code.

2. Compile the program using a C compiler. For example, using GCC:

   gcc factorial.c -o factorial

3. Run the compiled executable:

   ./factorial

4. Enter a non-negative integer when prompted.

5. The program will output the factorial of the entered number.

6. Optionally, you can choose to retry with a new input by entering 1 when prompted.

Example

Enter a number to find factorial: 5 Factorial of 5 is 120

Do you want to retry? (Enter 1 for yes, 0 for no): 1 Enter a number to find factorial: 8 Factorial of 8 is 40320

Do you want to retry? (Enter 1 for yes, 0 for no): 0 Exiting program. Goodbye!