The Go Language (PART-6)

Updated: Jul 5

Names in GO

The names of Go functions, variables, constants, types, statement labels, and packages follow a simple rule:

A name begins with a letter (that is, anything that Unicode deems a letter) or an underscore and may have any number of additional letters, digits, and underscores.

Case matters: heapSort and Heapsort are different names.

If an entity is declared within a function, it is local to that function. If declared outside of a function, however, it is visible in all files of the package to which it belongs. The case of the first letter of a name determines its visibility across package boundaries.

If the name begins with an upper-case letter, it is exported, which means that it is visible and accessible outside of its own package and may be referred to by other parts of the program, as with Printf in the fmt package. Package names themselves are always in lower case.

There is no limit on name length, but convention and style in Go programs lean toward short names, especially for local variables with small scopes; you are much more likely to see variables named i than theLoopIndex. Generally, the larger the scope of a name, the longer and more meaningful it should be.

Go programmers use "camel case" when forming names by combining words; that is, interior capital letters are preferred over interior underscores. Thus the standard libraries have functions with names like QuoteRuneToASCII and parseRequestLine but never quote_rune_to_ASCIIor parse_request_line.

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