08. Graduation

function graduation(input) {
    let name = input[0];
    let gradeNum = 0;
    let index = 1;
    let fail = 0;
    let sum = 0;

    while (gradeNum !== 12) {
        let score = Number(input[index++]);
        if (score < 4) {
            fail++;
            if (fail === 2) {
                break;
            }
        } else {
            sum += score;
        }
        gradeNum++;
    }

    if (fail === 2) {
        console.log(`${name} has been excluded at ${gradeNum} grade`);
    } else {
        console.log(`${name} graduated. Average grade: ${((sum / 12)).toFixed(2)}`);
    }
}

РEШЕНИЕ СЪС SHIFT И ТЕРНАРЕН ОПЕРАТОР:

function Graduation(input) {
    let name = input.shift();
    let gradeNum = 0;
    let fail = 0;
    let sum = 0;

    while (input.length !== 0){
        let score = Number(input.shift());
        score < 4? fail++ : sum += score;
        if (fail === 2) {
            break;
        }
        gradeNum++;
    }
    console.log(fail === 2? `${name} has been excluded at ${gradeNum} grade`
                : `${name} graduated. Average grade: ${((sum / 12)).toFixed(2)}`);
}