const sumTimeToSeconds = (hour, minute, second) => {
return (
parseInt(hour, 0) * 3600 + parseInt(minute, 0) * 60 + parseInt(second, 0)
);
};
const addTime = sumTimeToSeconds(3, 2, 1); //3 hours 2mins 1sec
const printTime = (seconds) => {
const h = Math.floor(seconds / 3600);
const m = Math.floor((seconds % 3600) / 60);
const s = Math.floor((seconds % 3600) % 60);
document.write(h + " hour " + m + " minute " + s + " seconds");
};
const initTime = () => {
const hours = prompt("add hour") || 0;
const minutes = prompt("add minutes") || 0;
const seconds = prompt("add seconds") || 0;
const currentTime = sumTimeToSeconds(hours, minutes, seconds);
const finalSeconds = currentTime + addTime;
printTime(finalSeconds);
};