`...T` in the last parameter slot accepts zero or more T values. Pass a slice by suffixing with `...` to spread it. Used everywhere from `fmt.Println` to custom builders.
Go
package main
import "fmt"
func sum(nums ...int) int {
total := 0
for _, n := range nums {
total += n
}
return total
}
func greet(prefix string, names ...string) {
for _, n := range names {
fmt.Println(prefix, n)
}
}
func main() {
fmt.Println(sum()) // 0
fmt.Println(sum(1, 2, 3, 4, 5)) // 15
// Spread a slice into variadic args
nums := []int{10, 20, 30}
fmt.Println(sum(nums...)) // 60
greet("Hello,", "Alice", "Bob", "Cara")
// Hello, Alice
// Hello, Bob
// Hello, Cara
}Save your own code snippets
Create a free account and build your private vault. Share publicly whenever you want.