• Go function can return multiple values.

Go 'If' statement

• Go's if statements are like its for loops; the expression need not be surrounded by parentheses ( ) but the braces { } are required
• Variables declared by the statement are only in scope until the end of the if.

	func pow(x, n, lim float64) float64 {
		if v := math.Pow(x, n); v < lim {
			return v
		}
		return lim
	}

• Variables declared inside an if short statement are also available inside any of the else blocks

Switch in Go

• Switch without a condition is the same as switch true. This construct can be a clean way to write long if-then-else chains

		func main() {
			t := time.Now()
			switch {
			case t.Hour() < 12:
				fmt.Println("Good morning!")
			case t.Hour() < 17:
				fmt.Println("Good afternoon.")
			default:
				fmt.Println("Good evening.")
			}
		}

Defer in Go

• A defer statement defers the execution of a function until the surrounding function returns. The deferred call's arguments are evaluated immediately, but the function call is not executed until the surrounding function returns.

    func main() {
    	defer fmt.Println("world")
    	fmt.Println("hello")
    }
  

Returns "hello" "world"