…_example.py)

## Summary

Fixed a type safety issue where user input was being used as a string without conversion to integer, which could cause runtime errors and type mismatches.

## Problem

The code was using `input()` which returns a string, but then using it directly in the f-string without converting it to an integer. This could cause:
- Type mismatches when the string is passed to functions expecting integers
- Runtime errors when users enter non-numeric input
- Inconsistent behavior with the function signature expectations

## Changes Made

Added proper input validation and type conversion:
- Wrapped the input processing in a try-except block
- Convert user input to integer using `int(user_input)`
- Added error handling for invalid input with user-friendly message
- Used the converted integer value in the f-string instead of raw string input

This ensures type safety and provides better user experience with proper error handling.