The deleteCount parameter tells splice() how many elements to delete. The start parameter tells splice() where to start modifying the array. The first 2 parameters to splice() are called start and deleteCount. Here's how you would remove 'c' using splice(): const arr = The splice() function is the only native array function that lets you remove elements from the middle of the array without creating a new array. It is most commonly used to remove elements from an array, but it can also be used to add elements to the middle of an array. The Array#splice() function lets you modify an array in-place by adding and removing elements.