Complicated switch case

complicated_switch_case.go

package main

import "fmt"

func addNumber(x, y int) int {
	return x + y
}

func subtractNumber(x, y int) int {
	return x - y
}

func divideNumber(x, y int) int {
	return x / y
}

func multiplyNumber(x, y int) int {
	return x * y
}

func calculateNumberSwitch(x, y int, param string) int {
	switch param {
	case "add":
		return addNumber(x, y)
	case "sub":
		return subtractNumber(x, y)
	case "div":
		return divideNumber(x, y)
	case "mul":
		return divideNumber(x, y)
	default:
		return 0
	}
}

func main() {
	var x, y = 10, 2
	fmt.Println(calculateNumberSwitch(x, y, "div"))
}