setTimeout in Node.js loop

Question

I\'m a bit confused as to how setTimeout works. I\'m trying to have a setTimeout in a loop, so that the loop iterations are, say, 1s apart. Each l

Answer 1

        let i = 20;
        let p = Promise.resolve(i)
        while (i > 0) {
        (i => {
            p = p.then(() => {
            return new Promise(function (resolve, reject) {
                setTimeout(function () {
                    console.log(i);
                resolve()
                }, 2000)
            })
            })
        })(i)
        i--
        }
        p = p.then(data => console.log('execution ends'))