Choosing Receivers

Now that you understand both value and pointer receivers, the key question is: when should you use each one? The decision comes down to what your method needs to do with the receiver.

Use a pointer receiver when your method needs to modify the original struct. Since pointer receivers work with the actual struct instance, any changes made inside the method will persist after the method returns. This is essential for methods that update fields, change state, or perform operations that should affect the original data.

Use a value receiver when your method only needs to read data from the struct without changing it. Value receivers work with a copy, so they're perfect for methods that calculate values, format output, or perform any operation that doesn't require modifying the original struct. They also provide safety by guaranteeing that the original data remains unchanged.

As a general rule: if your method changes the struct, use a pointer receiver. If your method only reads from the struct, use a value receiver. This approach makes your code's intentions clear and helps prevent unintended modifications to your data.