How Do Variadic Functions Work in Go?

Variadic Functions in Go

Variadic functions are a powerful tool in Go, allowing developers to define functions that accept a variable number of arguments. This can be useful in a variety of scenarios, such as when you need to accept an arbitrary number of input values.

Defining a Variadic Function

To define a variadic function in Go, simply use the ... syntax in the function signature. For example, the following function accepts any number of integer arguments:

func Add(num ...int) int {
    return args
}

Using a Variadic Function

You can use a variadic function like any other function in Go. Simply pass the values you want to use as arguments to the function. For example, the following code calls the Add function with three integer arguments:

fmt.Println(Add(1, 3, 4, 5,))

Behind the Scenes

When you call a variadic function, the function receives a slice of the specified type. In the case of the Add function, it receives a slice of integers. This slice can be used in the same way as any other slice in Go.

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