x = 55


def fn(ifElse):
    ifElse.add(lambda: 90 <= x < 100, lambda: "优秀")
    ifElse.add(lambda: 80 <= x < 90, lambda: "好")
    ifElse.add(lambda: 70 <= x < 80, lambda: "良")
    ifElse.add(lambda: 60 <= x < 70, lambda: "及格")
    ifElse.addDefault(lambda: "不及格")


level = _branches.ifElse(fn)
_console.log(level)