js的switch语句套用

let fruit = 'apple';

switch (fruit) {
    case 'apple':
        console.log('This is an apple.');
        break;
    case 'banana':
        console.log('This is a banana.');
        break;
    case 'cherry':
        console.log('This is a cherry.');
        break;
    default:
        console.log('Unknown fruit.');
}

let day = 'Monday';
let timeOfDay = 'morning';

switch (day) {
    case 'Monday':
        switch (timeOfDay) {
            case 'morning':
                console.log('It is Monday morning.');
                break;
            case 'afternoon':
                console.log('It is Monday afternoon.');
                break;
        }
        break;
    case 'Tuesday':
        // ... 其他天的逻辑
        break;
    default:
        console.log('Unknown day.');
}

switch (value) {
    case 1:
        console.log('One');
        break; // 添加break
    case 2:
        console.log('Two');
        break; // 添加break
    default:
        console.log('Default');
}

let value = 3;

switch (value) {
    case 1:
        console.log('One');
        break;
    case 2:
        console.log('Two');
        break;
    default:
        console.log('Default'); // 这里将会执行，因为value不是1也不是2
}