Golang compilation error: "undefined: json.Marshal" How to solve it?

Go language is an increasingly popular programming language. Its simplicity, efficiency, and ease of writing have been recognized by more and more developers. In Go language development, it is inevitable to encounter compilation errors. One of the common errors is "undefined: json.Marshal".

This error usually occurs when you use the "encoding/json" package of the Go standard library, and the compiler prompts that the definition of "json.Marshal" cannot be found. The root cause of this problem is that you did not import the "encoding/json" package correctly.

The solution is very simple, just add the following code to your Go file:

import "encoding/json"

If you confirm that this package has been imported normally in your code, but the compiler still If it prompts an "undefined: json.Marshal" error, then you need to check whether your code meets Go's syntax requirements, especially the naming and type of variables.

In addition, if you are using an older version of the Go language, there may be some syntax differences. In this case, you need to update your Go language version in time to avoid some unnecessary compilation errors.

In short, if you encounter the error "undefined: json.Marshal", you only need to import the "encoding/json" package correctly and check whether your code meets the grammatical requirements of the Go language. In this way, you can compile your Go code smoothly and develop happily.

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