<?php
$level = $branches->switchCase(85, function ($switchCase) {
    $switchCase->add(function ($it) {
        return $it >= 90 and $it < 100;
    }, function () {
        return "优秀";
    });
    $switchCase->add(function ($it) {
        return $it >= 80 and $it < 90;
    }, function () {
        return "好";
    });
    $switchCase->add(function ($it) {
        return $it >= 70 and $it < 80;
    }, function () {
        return "良";
    });
    $switchCase->add(function ($it) {
        return $it >= 60 and $it < 70;
    }, function () {
        return "及格";
    });
    $switchCase->addDefault(function () {
        return "不及格";
    });
});
$console->log($level);