Variadic Functions

Variadic functions accept any number of values for one parameter.
variadic parameter A parameter written with `...` accepts zero or more values.
                            bonus
                            bonus = 5 (default)bonus = 0bonus = 10
                        

                            variadic_functions.go
                        
Replay: real traced execution (multi-file project)

                            package main

import "fmt"

func sum(values ...int) int {
	total := 0
	for _, value := range values {
		total += value
	}
	return total
}

func main() {
	var bonus = 5
	values := []int{2, 3, bonus}
	total := sum(values...)

	fmt.Println("values=", values)
	fmt.Println("total=", total)
}
package main

import "fmt"

func sum(values ...int) int {
	total := 0
	for _, value := range values {
		total += value
	}
	return total
}

func main() {
	var bonus = 0
	values := []int{2, 3, bonus}
	total := sum(values...)

	fmt.Println("values=", values)
	fmt.Println("total=", total)
}
package main

import "fmt"

func sum(values ...int) int {
	total := 0
	for _, value := range values {
		total += value
	}
	return total
}

func main() {
	var bonus = 10
	values := []int{2, 3, bonus}
	total := sum(values...)

	fmt.Println("values=", values)
	fmt.Println("total=", total)
}

                        
1bonus ← 5, values ← []int{2, 3, 5}⋯13func main() {14  var bonus→ 5 = 5 //@bonus=0, 1015  values→ []int{2, 3, 5} := []int{2, 3, bonus5}16  total := sum(values[]int{2, 3, 5}...)⋯
2total ← 0⋯5func sum(values[]int{2, 3, 5} ...int) int {6  total→ 0 := 07  for _, value := range values {⋯
3total ← 2pass 1 of 3⋯6total := 07for _, value2 := range values[]int{2, 3, 5} {8  total→ 2 += value29}⋯All 3 passes — pass 1 is the card abovepassvaluetotal
120 → 2
232 → 5
355 → 10
4return total⋯9  }10  return total1011}⋯
5total ← 10⋯15  values := []int{2, 3, bonus}16  total→ 10 := sum(values[]int{2, 3, 5}...)1718  fmt.Println("values=", values[]int{2, 3, 5})19  fmt.Println("total=", total10)20}⋯outputvalues= [2 3 5]
total= 10
1bonus ← 0, values ← []int{2, 3, 0}⋯13func main() {14  var bonus→ 0 = 015  values→ []int{2, 3, 0} := []int{2, 3, bonus0}16  total := sum(values[]int{2, 3, 0}...)⋯
2total ← 0⋯5func sum(values[]int{2, 3, 0} ...int) int {6  total→ 0 := 07  for _, value := range values {⋯
3total ← 2pass 1 of 3⋯6total := 07for _, value2 := range values[]int{2, 3, 0} {8  total→ 2 += value29}⋯All 3 passes — pass 1 is the card abovepassvaluetotal
120 → 2
232 → 5
305
4return total⋯9  }10  return total511}⋯
5total ← 5⋯15  values := []int{2, 3, bonus}16  total→ 5 := sum(values[]int{2, 3, 0}...)1718  fmt.Println("values=", values[]int{2, 3, 0})19  fmt.Println("total=", total5)20}⋯outputvalues= [2 3 0]
total= 5
1bonus ← 10, values ← []int{2, 3, 10}⋯13func main() {14  var bonus→ 10 = 1015  values→ []int{2, 3, 10} := []int{2, 3, bonus10}16  total := sum(values[]int{2, 3, 10}...)⋯
2total ← 0⋯5func sum(values[]int{2, 3, 10} ...int) int {6  total→ 0 := 07  for _, value := range values {⋯
3total ← 2pass 1 of 3⋯6total := 07for _, value2 := range values[]int{2, 3, 10} {8  total→ 2 += value29}⋯All 3 passes — pass 1 is the card abovepassvaluetotal
120 → 2
232 → 5
3105 → 15
4return total⋯9  }10  return total1511}⋯
5total ← 15⋯15  values := []int{2, 3, bonus}16  total→ 15 := sum(values[]int{2, 3, 10}...)1718  fmt.Println("values=", values[]int{2, 3, 10})19  fmt.Println("total=", total15)20}⋯outputvalues= [2 3 10]
total= 15