Normal function parameter with variadic function parameter


Example

package main

import "fmt"

func main() {
	fmt.Println(calculation("Rectangle", 20, 30))
	fmt.Println(calculation("Square", 20))
}

func calculation(str string, y ...int) int {

	area := 1

	for _, val := range y {
		if str == "Rectangle" {
			area *= val
		} else if str == "Square" {
			area = val * val
		}
	}
	return area
}

Output

600
400
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