lt;/code>, <code>€</code>, <code>₹</code>, <code>¥</code>). Provide comprehensive solutions showing how to achieve this across major tools like Excel, Power BI (DAX), Google Sheets, and Custom Code (JavaScript/Python). Feel free to share practical code snippets, custom number format strings, dynamic DAX patterns, or JavaScript/Python utility functions! 🚀✨ overall formatting rules to ensure maximum readability and professional presentation. 📊💡🎯 To answer this comprehensively, let's break down dynamic numeric formatting across four major technology environments: **Excel**, **Power BI (DAX)**, **Google Sheets**, and **Custom Code (JavaScript & Python)**, followed by universal design rules for clean data visualization. --- ### 1. Microsoft Excel Solutions #### A. Custom Number Formats (Native - Static Rules by Threshold) Excel custom format strings allow up to 4 sections separated by semicolons: `[Positive];[Negative];[Zero];[Text]`. You can also embed conditional brackets `[>1000000]` to dynamically route magnitudes. 1. **Millions & Thousands Auto-Scaling String:** ```excel [>=1000000]$#,##0.0,, | TRAJECTRY