const month = prompt("Enter month number :");

switch (month){
case "1": console.log("Number of days: 31")
break;
case "2": console.log("Number of days: 28")
break;
case "3": console.log("Number of days: 31")
break;
case "4": console.log("Number of days: 30")
break;
case "5": console.log("Number of days: 31")
break;
case "6": console.log("Number of days: 30")
break;
case "7": console.log("Number of days: 31")
break;
case "8": console.log("Number of days: 31")
break;
case "9": console.log("Number of days: 30")
break;
case "10": console.log("Number of days: 31")
break;
case "11": console.log("Number of days: 30")
break;
case "12": console.log("Number of days: 31")
break;
default:
console.log("Incorrect month entered, enter numbers from 1 - 12")
}