golang error: 'invalid character...in string literal' How to solve it?

Golang is an increasingly popular programming language. Its efficiency and simplicity make it the choice of many developers. However, during the Golang development process, we will inevitably encounter some errors. Among them, "invalid character...in string literal" is a relatively common error. This article will introduce how to solve this problem.

1. Understanding string literals

In Golang, string literals can only contain printable ASCII characters and escape characters. If you use other illegal characters or illegal escape characters in the string, an "invalid character" error will appear.

For example, if your string contains control characters or special characters, such as tabs or newlines, this error will appear. The solution is to escape these characters into legal ASCII characters or correct escape characters.

2. Check the editor encoding settings

If you use non-UTF-8 encoding in the editor, an "invalid character" error will also appear. In this case, you need to check your editor's encoding settings and change it to UTF-8.

After this, you still need to ensure that your code does not contain illegal characters or illegal escape characters.

3. Check the file encoding format

If your code file uses an encoding format different from UTF-8, it will also cause an "invalid character" error. In this case, you need to change the file encoding to UTF-8.

You can open your code file in an editor or text processing software and view its encoding format. If it doesn't display UTF-8, you need to save it as a UTF-8 file.

4. Use escape characters

If you need to use special characters in a string, such as quotation marks, backslashes, etc., you need to use escape characters to represent them . For example, if you want to add a double quote to a string, you need to escape it using "".

The correct way to write it is:

str := "Hello, "World"!"

instead of:

str := "Hello, "World"!"

5. Use raw string literals

In some cases Next, if your string needs to contain a large number of special characters, you can use raw string literals. Raw string literals ignore escape characters in the string and output its contents unchanged.

The correct way to write it is:

str := `Hello, "World"!`

instead of:

str := "Hello, "World"!"

Summary

In Golang development, it is not necessary to encounter the error report of "invalid character" rare. This problem may be caused by multiple factors such as illegal characters in the string, editor encoding settings, file encoding format, etc. To solve this problem, you need to check whether the string literals in the code are legal, check the encoding settings of the editor and file, and use escape characters or raw string literals to handle special characters.

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