| [_Variadic functions_](http://en.wikipedia.org/wiki/Variadic_function) can be called with any number of trailing arguments. For example, `fmt.Println` is a common variadic function. | ||
package main |
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import "fmt" |
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| Here's a function that will take an arbitrary number of `int`s as arguments. | func sum(nums ...int) { |
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fmt.Print(nums, " ") |
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total := 0 |
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for _, num := range nums { |
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total += num |
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} |
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fmt.Println(total) |
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} |
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func main() { |
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| Variadic functions can be called in the usual way with individual arguments. | sum(1, 2) |
[1 2] 3 |
sum(1, 2, 3) |
[1 2 3] 6 |
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| If you already have multiple args in a slice, apply them to a variadic function using `func(slice...)` like this. | nums := []int{1, 2, 3, 4} |
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sum(nums...) |
[1 2 3 4] 10 |
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} |