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PromptWrite a Python function to calculate the factorial of a number

ChatGPTOpenAI

Write a Python function to calculate the factorial of a number

Here is a Python function to calculate the factorial of a number:

def factorial(n):
    if n < 0:
        return "Error: Factorial not defined for negative numbers"
    elif n == 0 or n == 1:
        return 1
    else:
        result = 1
        for i in range(2, n + 1):
            result *= i
        return result

This iterative approach is efficient and handles edge cases.

2:30 PM

ClaudeAnthropic

Write a Python function to calculate the factorial of a number

I will provide you with a Python factorial function:

def factorial(n):
    """Calculate the factorial of a non-negative integer."""
    if not isinstance(n, int) or n < 0:
        raise ValueError("Input must be a non-negative integer")
    
    if n <= 1:
        return 1
    
    return n * factorial(n - 1)

This recursive solution includes input validation and documentation.

2:30 PM

GeminiGoogle

Write a Python function to calculate the factorial of a number

Here is how to calculate factorial in Python:

import mathdef factorial(n):
    # Using Python built-in math.factorial for optimal performance
    try:
        return math.factorial(n)
    except (ValueError, TypeError):
        return f"Invalid input: {n}. Please provide a non-negative integer."

This leverages Python optimized built-in function for best performance.

2:30 PM