Complicated if else

complicated_if_else.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 calculateNumberIf(x, y int, param string) int {
	if param == "add" {
		return addNumber(x, y)
	} else if param == "sub" {
		return subtractNumber(x, y)
	} else if param == "div" {
		return divideNumber(x, y)
	} else if param == "mul" {
		return multiplyNumber(x, y)
	}
	return 0
}

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