<?php
$level = $branches->ifElse(function ($ifElse) {
    $x = 55;
    $ifElse->add(function () use ($x) {
        return $x >= 90 and $x < 100;
    }, function () {
        return "优秀";
    });
    $ifElse->add(function () use ($x) {
        return $x >= 80 and $x < 90;
    }, function () {
        return "好";
    });
    $ifElse->add(function () use ($x) {
        return $x >= 70 and $x < 80;
    }, function () {
        return "良";
    });
    $ifElse->add(function () use ($x) {
        return $x >= 60 and $x < 70;
    }, function () {
        return "及格";
    });
    $ifElse->addDefault(function () {
        return "不及格";
    });
});
$console->log($level);