todo.js

let todo = [];

let req = prompt("Enter your request");

while(true) {
    if(req == "quit") {
        console.log("quitting app");
        break;
    }
    if(req == "list") {
        console.log("***********************");
        for(let i=0; i<todo.length; i++) {
            console.log(i, todo[i]);
        }
        console.log("***********************");
    }
    else if(req == "add") {
        let task = prompt("please enter a task to add");
        todo.push(task);
        console.log("task added successfully");
    }
    else if(req ==  "delete") {
        let idx = prompt("please enter the task index");
        todo.splice(idx, 1);
        console.log("task deleted")
    }
    else {
        console.log("wrong request");
    }

    req = prompt("Enter your request");
}