How Do Variadic Parameters Work in Go Function Declarations?

Variadic Parameters in Go Function Declarations

In the Go programming language, when you declare a function, you may see an ellipsis, represented by three dots (... ), adjacent to a parameter. This syntax signifies that the function can accept a variable number of arguments of that specific type.

The following example illustrates the use of variadic parameters:

func Statusln(a ...interface{})
func Statusf(format string, a ...interface{})

Explanation:

The ...interface{} syntax tells the compiler that the Statusln and Statusf functions can take any number of arguments of type interface{}. This means that you can call these functions with a varying number of parameters, such as:

Statusln("hello", "world", 42)
Statusf("Name is %s", "John")

When these functions are called, the a parameter will be assigned the following values respectively:

a := []interface{}{"hello", "world", 42}
a := []interface{}{"John"}

You can use the a slice to iterate over and process all the provided arguments. Variadic parameters are commonly used in functions like fmt.Printf(), which accepts a variable number of arguments to format and print according to the format string.

The above is the detailed content of How Do Variadic Parameters Work in Go Function Declarations?. For more information, please follow other related articles on the PHP Chinese website!