Create a program of factorial using class in python.

CONTRIBUTORS.md

@@ -52,4 +52,5 @@
 | Ankita Sinha Ray |<a href="https://github.com/ankitasray">ankitasray</a>|
 | Aditya Pandey |<a href="https://github.com/Aditya7pandey">Aditya7pandey</a>|
 | Yash Bandal |<a href="https://github.com/Yash-Bandal">Yash Bandal</a>|
-| Harshit Jaiswal |<a href="https://github.com/harshu84190">Harshit Jaiswal</a>|
+| Harshit Jaiswal |<a href="https://github.com/harshu84190">Harshit Jaiswal</a>|
+| Himanshu Chaurasia |<a href="https://github.com/Himanshuchaurasia9">Himanshu Chaurasia</a>|

Python/factorial_using_class.py

@@ -0,0 +1,21 @@
+class FactorialCalculator:
+    def __init__(self, number):
+        self.number = number
+
+    def calculate_factorial(self):
+        if self.number < 0:
+            return "Factorial is not defined for negative numbers."
+        elif self.number == 0 or self.number == 1:
+            return 1
+        else:
+            result = 1
+            for i in range(2, self.number + 1):
+                result *= i
+            return result
+
+# Example usage:
+if __name__ == "__main__":
+    num = 6
+    factorial_calculator = FactorialCalculator(num)
+    result = factorial_calculator.calculate_factorial()
+    print(f"The factorial of {num} is: {result}")