JSFiddle - React, Tailwind, and code Playground

JavaScript

function printListStartingAtIndex(list, index) { 
    if (index > list.length - 2) {
        alert(list[list.length-index-1]);
    } else {
        printListStartingAtIndex(list, index + 1);
        alert(list[list.length-index-1]);   
    }
}

//don't change these lines
var list = [0, 2, 4, 5, 6, 7, 9, 100];
printListStartingAtIndex(list, 0);