Functions
Go functions are similar to functions in other programming languages.
- A function can take zero or more arguments.
- Arguments can have default values.
- The last argument can be variadic (variable lenght).
Some things to be aware of
- Functions can return more than one value.
- Functions can return labeled variables.
- Functions always receive arguments by value.
Syntax and use:
func load() {}
func load(file string) {}
func add(a int, b int) int {
return a + b
}
func subtract(a, b int) int {
return a - b
}
func addAndSubtract(a int, b int) (int, int) {
return a + b, a - b
}
Labelled return values, but try to limit the use of this as it obscures where return values are set as functions grow tall.
func multiply(a, b int) (result int) {
result = a * b
return
}
Using function return values
Escape the return values you don't need with _.
func main() {
sum, _ := addAndSubtract(1, 2)
fmt.Println(sum)
}
Why would you want to escape a return value?