'use strict';

// Use switch

const getDay = (n) => {

switch (n) {

case 1:

return 'Monday';

case 2:

return 'Tuesday';

case 3:

return 'Wednesday';

case 4:

return 'Thursday';

case 5:

return 'Friday';

case 6:

return 'Saturday';

case 7:

return 'Sunday';

default:

return new Error(`Invalid day number: ${n}`);

}

};

console.log(getDay(2));

// Use collection

const days = [

'Monday',

'Tuesday',

'Wednesday',

'Thursday',

'Friday',

'Saturday',

'Sunday',

];

const getDayWithoutSwitch = (n) =>

n > 0 && n <= days.length

? days[n - 1]

: new Error(`Invalid day number: ${n}`);

const getDayNumber = (name) => {

const n = days.indexOf(name);

return n !== -1 ? n + 1 : new Error(`Invalid day name: ${name}`);

};

console.log(getDayWithoutSwitch(2));

console.log(getDayWithoutSwitch(20));

console.log(getDayNumber('Sunday'));