Decimal vs. Double in C#: When to Use Which?

Choosing Between decimal and double in C#

C#'s double type, while widely used, can sometimes lead to precision errors. This article clarifies when to use double and when the decimal type is a better choice.

For financial calculations, especially those involving large sums (over $100 million), decimal is the superior option. Its higher precision is crucial for accurate monetary computations.

In contrast, double is well-suited for applications where precise values are less critical, such as graphics rendering, physics simulations, or other scientific calculations. Here, the performance advantage of double often outweighs the need for absolute precision.

The key takeaway: Prioritize decimal when precise summation and balanced calculations are paramount. This includes financial transactions, scorekeeping, and any numeric values easily verifiable by manual calculation.

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