Salesforce Platform Developer Practice Exam 2026 – All-in-One Guide to Ace Your Certification!

In Apex, a currency field is assigned to the Decimal primitive data type. This choice is appropriate because currency values often require a high level of precision due to their financial nature, including the need for accurate representation of fractional amounts. The Decimal data type in Apex is specifically designed to handle fixed-point decimal numbers, which makes it suitable for financial calculations where precision is paramount.

Using Decimal ensures that calculations on currency fields remain accurate by avoiding issues such as rounding errors that can occur with floating-point types like Double. While Integer and Double are other types available in Apex, they do not provide the specific precision and scale needed for currency representation. Integer lacks the ability to represent fractions, while Double can introduce inaccuracies in calculations due to its floating-point nature. Currency as a standalone type is not utilized in Apex, hence the need to rely on Decimal for handling currency fields effectively.