en.javascript.info/1-js/7-js-misc/3-setTimeout-setInterval/1-output-numbers-100ms/solution.md

//+ run
function printNumbersInterval() {
  var i = 1;
  var timerId = setInterval(function() {
    console.log(i);
    if (i == 20) clearInterval(timerId);
    i++;
  }, 100);
}

// вызов
printNumbersInterval();