.pop()

Removes the last element of an array, decrements the array length, and returns the value that it removed.

array.pop();

To pop the element 'sleep' from the schedule array:

const schedule = ['wake up', 'eat', 'work', 'play', 'sleep'];
const lastThingToDo = schedule.pop();

console.log(lastThingToDo);
// Output: sleep

console.log(schedule);
// Output: ['wake up', 'eat', 'work', 'play']