Graduation

function graduation(input) {
    index = 0;
    let studentName = input[index];
    index++;
    let year = 0;
    let badGrades = 0;
    let sumGrades = 0;
    let isExcluded = false;
    while (year < 12) {
        let currentGrade = Number(input[index]);
        index++;
        if (badGrades === 2) {
            year += 1;
            console.log(`${studentName} has been excluded at ${year} grade`);
            isExcluded = true;
            break;
        }
        if (currentGrade >= 4) {
            year += 1;
            sumGrades += currentGrade;
        } else {
            sumGrades += currentGrade;
            badGrades += 1;
        }
    }
    let averageGrade = sumGrades / year;
    if (isExcluded) {
    } else {
        console.log(`${studentName} graduated. Average grade: ${averageGrade.toFixed(2)}`);
    }
}