onTimeForExam

function onTimeForExam (input){

    let examHour = input.shift();
    let examMinutes = input.shift();
    let arrivalHour = input.shift();
    let arrivalMinutes = input.shift();

    examInMinutes = (examHour * 60) + examMinutes;
    arrivalInMinutes = (arrivalHour * 60) + arrivalMinutes;
    lateTime = arrivalInMinutes - examInMinutes;
    earlyTime = examInMinutes - arrivalInMinutes;

    if (lateTime > 0){
        console.log(`Late`);
        if (lateTime <= 59){
            console.log(`${lateTime} minutes after the start`);
        }else{
            hours = Math.abs(lateTime / 60);
            minutes = Math.abs(lateTime % 60);
            console.log(`${hours}:${minutes.toFixed(2)} hours after the start`);
        }
    }else if (earlyTime >= 0 && earlyTime <=30){
        console.log(`On time`);
        if (earlyTime != 0){
            console.log(`${earlyTime} minutes before the start`);
        }
    }else if (earlyTime > 30){
        console.log(`Early`);
        if (earlyTime <=59){
            console.log(`${earlyTime} minutes before the start`);
        }else{
            hours = earlyTime / 60;
            minutes = earlyTime % 60;
            console.log(`${hours}:${minutes.toFixed(2)} hours before the start`)
        }
    }
}
onTimeForExam([14,00,13,55]);