howManydays.js

// Task
// Complete function howManydays, function accept 1 parameters:month, means the month of year, different month has different days (refer to the following table), return a number that how many days in this month(month is always greater than 0, less than or equal to 12).

// +---------------+-------------+
// |    month      |    days     |
// +---------------+-------------+
// |1,3,5,7,8,10,12|     31      |
// +---------------+-------------+
// |4,6,9,11       |     30      |
// +---------------+-------------+
// |2              |     28      |  (Do not consider the leap year)
// +---------------+-------------+

function howManydays(month) {
    switch (month) {
      case 4:
      case 6:
      case 9: 
      case 11:
        return 30
      case 2:
        return 28
      default:
        return 31
    }
  }