Explain the use of Go's documentation and comments for documenting and explaining the design and implementation of Go programs?

Go provides support for documentation and comments to help developers document and explain the design and implementation of their programs. In Go, documentation and comments are written using the syntax of the Go Programming Language Specification. There are two types of comments in Go: single-line comments and multi-line comments.

Single-line comments start with two forward slashes (**//**) and are used for writing comments that are no more than a line long. Multi-line comments start with **/*** and end with ***/** and are used for writing comments that span multiple lines.

Go also has a built-in documentation system called **godoc**. **godoc** is a command-line tool that generates documentation for Go programs in HTML format. **godoc** extracts documentation from Go source code comments, along with some other metadata, such as package names, function names, and variable names. It then generates a comprehensive HTML documentation website that includes all the packages, functions, and variables in the program.

Additionally, Go provides support for special comment tags, called annotations, that can be used to document Go code and provide additional information about functions, variables, and types. These annotations can be used to specify things like the expected behavior of a function or the purpose of a variable. These annotations are used by the **godoc** tool to generate more detailed and informative documentation for Go programs.

Overall, Go's documentation and comments support provides developers with a useful toolset for documenting and explaining the design and implementation of their programs, making it easier for others to understand and use their code.