// ## Varadic Functions

// Varadic functions can be called with any number of
// trailing arguments. This is useful if you don't know
// number of arguments that will be needed for a function
// ahead of time.

package main                   
                               
import "fmt"

// Varadic args are declared with `...type` and
// passed in as a slice.
func add(nums ...int) int {    
    fmt.Print(nums, " ")       
    total := 0
    for _, num := range nums {        
        total += num                
    }
    return total                    
}                                   
                                    
func main() {
    // Varadic functions can be called in the usual way.
    fmt.Println(add(1, 2))     
    fmt.Println(add(1, 2, 3))    

    // If you already have multiple args in a slice,
    // apply them to a varadic function using `
    // func(slice...)`.                              
    nums := []int{1, 2, 3, 4}  
    fmt.Println(add(nums...))  
}