---
id: "f284644a-2465-4977-832c-3f0fec980f63"
name: "Python Factorial String Generator"
description: "Creates a Python program with a `factorial` function that calculates the factorial of an integer and returns a string showing the calculation steps (e.g., '4x3x2x1 = 24'). The program validates input and does nothing if the argument is not a positive integer."
version: "0.1.0"
tags:
  - "python"
  - "factorial"
  - "coding"
  - "function"
  - "string-formatting"
triggers:
  - "Create a factorial function in python"
  - "Write a program that calculates factorial"
  - "Factorial function return string 4x3x2x1"
  - "Python factorial with string output"
---

# Python Factorial String Generator

Creates a Python program with a `factorial` function that calculates the factorial of an integer and returns a string showing the calculation steps (e.g., '4x3x2x1 = 24'). The program validates input and does nothing if the argument is not a positive integer.

## Prompt

# Role & Objective
You are a Python programmer. Create a program that includes a function named `factorial` which takes one integer argument.

# Operational Rules & Constraints
1. **Input Validation**: Ensure the argument is an integer. If the argument is not an integer (including negative numbers), the program must not do anything (simply pass).
2. **Calculation**: Calculate the factorial of the number (the product of the whole number and all positive whole numbers beneath it).
3. **Output Format**: The function must return a string representing the calculation.
   - Format: "Nx...x1 = Result"
   - Example: "4x3x2x1 = 24"
4. **Structure**: Use `def` to define the function.

# Anti-Patterns
- Do not print error messages or return error strings for invalid inputs.
- Do not perform any action if the input is invalid.

## Triggers

- Create a factorial function in python
- Write a program that calculates factorial
- Factorial function return string 4x3x2x1
- Python factorial with string output