What does the indefinite parameter type in go language mean?

The indefinite parameter type in the Go language means that the number of parameters passed in by the function is an indefinite number. The code example is such as "func Add(a int, args ...int) (result int)".

The operating environment of this article: windows10 system, Go 1.11.2, thinkpad t480 computer.

Indefinite parameters means that the number of parameters passed in by the function is an indefinite number.

package main
 
import (
    "fmt"
)
 
 
//不定参数函数
func Add(a int, args ...int) (result int) {
    result += a
    for _, arg := range args {
        result += arg
    }
    return
}
 
func main() {
    fmt.Println(Add(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))

The args in the code is an array slice and can only be placed at the end of the parameter.

Related expansion introduction:

Go (also known as Golang) is a statically strongly typed, compiled, concurrent programming language developed by Google and has garbage collection capabilities.

Robert Griesemer, Rob Pike and Ken Thompson began designing Go in September 2007, and later Ian Lance Taylor, Russ Cox joins the project. Go is developed based on the Inferno operating system. Go was officially announced in November 2009, becoming an open source project and implemented on Linux and Mac OS X platforms, and later added implementation under Windows systems. In 2016, Go was selected as "TIOBE's Best Language of 2016" by the software evaluation company TIOBE. Currently, Go releases a second-level version every six months (that is, upgrading from a.x to a.y).

Go's syntax is close to C language, but the declaration of variables is different. Go supports garbage collection. Go's parallel model is based on Tony Hall's Communicating Sequential Process (CSP). Other languages ​​that adopt a similar model include Occam and Limbo, but it also has features of Pi operations, such as channel transmission. Plugin support is opened in version 1.8, which means that some functions can now be dynamically loaded from Go.

Compared with C, Go does not include functions such as enumeration, exception handling, inheritance, generics, assertions, virtual functions, etc., but it adds slice type, concurrency, pipes, garbage collection, Language-level support for features such as interfaces. The Go 2.0 version will support generics, but has a negative attitude towards the existence of assertions, and also defends that it does not provide type inheritance.

Unlike Java, Go has built-in associative arrays (also known as hash tables (Hashes) or dictionaries (Dictionaries)), just like string types.

Related recommendations: golang tutorial

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