# Replace multiple if statements with a single switch statement

We demonstrate the trick with a simple issue: Determine the quarter of a given date. Since the month in JavaScript is zero-based, the month of a given ``date`` can be determined as
`// `date` is the input dateconst month = date.getMonth() + 1;`
The quarter is calculated based on the range of month:
`let quarter = 1;if (month <= 3) {    quarter = 1;} else if (month <= 6) {    quarter = 2;} else if (month <= 9) {    quarter = 3;} else {    quarter = 4;}`
It is not easy for us to scan multiple ``if`` statements above. We can make it more readable with a single ``switch (true)`` statement:
`switch (true) {    case month <= 3:        quarter = 1;        break;    case month <= 6:        quarter = 2;        break;    case month <= 9:        quarter = 3;        break;    default:        quarter = 4;        break;}`
This trick gives us an idea of using ``switch (true)`` to make the code more readable. The specific issue in this post, calculating the quarter of a given date, can be done with a single line-of-code.