Functions

Functions in Go can take zero or more arguments.

To make code easier to read, the variable type comes after the variable name.

For example, the following function:

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

Accepts two integer parameters and returns another integer.

Here, func sub(x int, y int) int is known as the "function signature".

package main

import "fmt"

func concat(s1 string, s2 string) string {
	return s1 + s2
}

// don't touch below this line

func main() {
	test("Lane,", " happy birthday!")
	test("Zuck,", " hope that Metaverse thing works out")
	test("Go", " is fantastic")
}

func test(s1 string, s2 string) {
	fmt.Println(concat(s1, s2))
}

Multiple Parameters

When multiple arguments are of the same type, and are next to each other in the function signature, the type only needs to be declared after the last argument.

Here are some examples:

func addToDatabase(hp, damage int) {
  // ...
}

func addToDatabase(hp, damage int, name string) {
  // ?
}

func addToDatabase(hp, damage int, name string, level int) {
  // ?
}