GradingStudents.js

/*
 * Complete the 'gradingStudents' function below.
 *
 * The function is expected to return an INTEGER_ARRAY.
 * The function accepts INTEGER_ARRAY grades as parameter.
 * https://www.hackerrank.com/challenges/grading/problem?isFullScreen=true
 */

function gradingStudents(grades) {
    // Write your code here
    function findDiff(grade) {
        const nextMultiple = grade + (5 - (grade % 5));
        const difference = nextMultiple - grade;
        return [difference, nextMultiple] ;
    }
    
    let finalGrades = [];
    for (let grade of grades) {
        if (grade < 38 || findDiff(grade)[0] >= 3) finalGrades.push(grade);
        else if (findDiff(grade)[0] < 3) {
          finalGrades.push(findDiff(grade)[1]);  
        }
    }
    return finalGrades;

}