JS Practice — Built-in Objects

setFullYear() — date is mutated

📖 Usage Example

const d = new Date(2024, 0, 15)
d.setFullYear(2030)
d.getFullYear()  // → 2030

Use setFullYear() to mutate the year of a Date object in place; the month and day remain unchanged.

Date.prototype.setFullYear()

The original Date object is changed after calling setFullYear().

Challenge: Verify that the year changes from 2024 to 1990 after calling setFullYear(1990).

💡 Hints (1)

• setFullYear() modifies the Date in place — check with getFullYear() after calling it