prefix_to_currency_code: Convert Currency Prefix to ISO 4217 Code
Description
Maps common currency symbols to their ISO 4217 codes for use in
JavaScript's Intl.NumberFormat.
Usage
prefix_to_currency_code(prefix)
Value
ISO 4217 currency code (e.g., "USD", "EUR", "GBP")
Arguments
- prefix
Currency symbol (e.g., "$", the Euro sign, the Pound sign)