The index of the last element is -1, and the index of second last element is -2, and so on.

In JavaScript slice() method, you can use negative index for start and end parameters. Output: JavaScript slice() Negative Index EXAMPLE const cars = // no value console.log(cars.slice()) // expected output: // single index console.log(cars.slice(4)) // expected output: // from middle index console.log(cars.slice(4,7)) // expected output: // from beginning of the index console.log(cars.slice(0,4)) // expected output: // negative index console.log(cars.slice(-4)) // expected output: // from index 6 to -3(excluded) console.log(cars.slice(4,-1)) // expected output: ĮXAMPLES JavaScript slice() method const cars = // slicing the hole array from starting to end let ncars = cars.slice() console.log(ncars) // // slicing from the middle of the array let middleIndex = Math.floor(cars.length / 2) let middleArr = cars.slice(middleIndex) console.log(middleArr) // // slicing from the second element to second last element let second = 1 let secondLast = cars.length - 1 let almostFull = cars.slice(second, secondLast) console.log(almostFull) // end is treated as end-1 internally in the slice() method of the array. The slice() method does not change the original array. JavaScript’s Array slice() method returns a copy of the array as new array, For returning the new array it accepts parameters that are optional as well, a start which is inclusive and an end that is exclusive which means if you have passed 1 as start(index) and 3 as end(index) then slice will return a new copy of your given array which will contain two values(indexes).

Js slice array