# Python function for factorial calculation | Simple code snippet

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## Introduction:

Calculating the factorial of a number is a common mathematical operation in programming. In Python, we can easily calculate the factorial of a number using a simple code snippet. In this article, we will discuss how to write a Python function for factorial calculation.

## The Python Function:

The Python function for factorial calculation is straightforward. We can define the function as follows:

``````
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
``````

In the above code snippet, we define a function called 'factorial' that takes a single argument 'n'. The function first checks if the value of 'n' is equal to 0. If 'n' is 0, the function returns 1. If 'n' is not equal to 0, the function recursively calls itself with the argument 'n-1' and multiplies the result with 'n'. This process continues until 'n' becomes 0.

## Usage:

To use the 'factorial' function, we can simply call it with the desired argument. For example, if we want to calculate the factorial of 5, we can call the function as follows:

``````
result = factorial(5)
print(result)
``````

This will output the result of the factorial calculation, which is 120.

## Conclusion:

In conclusion, calculating the factorial of a number is a simple task in Python. We can easily write a function for factorial calculation using a simple code snippet. This function can be used to calculate the factorial of any number.

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