go by example part 2

5-go-by-example/14-variadic-function.go

@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+// Variadic functions can be called with any number of trailing arguments
+
+// take an arbitrary number of ints as arguments
+func sum(nums ...int) {
+	fmt.Print(nums, " ")
+	total := 0
+	for _, num := range nums {
+		total += num
+	}
+	fmt.Println(total)
+}
+
+func main() {
+
+	// Variadic functions can be called in the usual way
+	sum(1, 2)
+	sum(1, 2, 3)
+
+	// apply multiple args to a variadic function
+	nums := []int{1, 2, 3, 4}
+	sum(nums...)
+}