js swich 算年月日

function getMonthName(monthNumber) {
  let monthName;
  switch (monthNumber) {
    case 1:
      monthName = 'January';
      break;
    case 2:
      monthName = 'February';
      break;
    // ... 其他月份的case ...
    case 12:
      monthName = 'December';
      break;
    default:
      monthName = 'Invalid month';
  }
  return monthName;
}

console.log(getMonthName(1)); // 输出: January
console.log(getMonthName(12)); // 输出: December
console.log(getMonthName(13)); // 输出: Invalid month

function isLeapYearFebruary(year, month) {
  if (month === 2) { // 检查是否是二月
    if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {
      return true; // 是闰年的二月
    } else {
      return false; // 不是闰年的二月
    }
  } else {
    return false; // 不是二月
  }
}

console.log(isLeapYearFebruary(2020, 2)); // 输出: true
console.log(isLeapYearFebruary(2021, 2)); // 输出: false

const date = new Date();
const year = date.getFullYear();
const month = date.getMonth() + 1; // getMonth()返回的月份是从0开始的
const day = date.getDate();

console.log(`Year: ${year}, Month: ${month}, Day: ${day}`);