Go语法之switch

第一种写法 ------ switch x

注意:switch会自动break,除非使用fallthrough

[go]func branch(a, b int, op string) int {     var result int     switch op {     case "+":         result = a + b     case "-":         result = a - b     case "*":         result = a * b     case "/":         result = a / b     default:         panic("unexpected op:" + op)     }     fmt.Println(result)     return result }[/go]

第二种写法 ------ switch后直接写花括号

[go]func grade(score int) string {     g := ""     switch {     case score < 0 || score > 100:         panic(fmt.Sprintf(             "Wrong score: %d", score))     case score < 60:         g = "F"     case score < 80:         g = "C"     case score < 90:         g = "B"     case score <= 100:         g = "A"     }     return g }[/go]