Problem

Code

function solution(a, b) {
    let answer = 0;
    if (a === b) {
        return a;
    } else {
        if (b > a) {
            for (let i=a; i<b+1; i++) {
                answer += i;
            }
        } else {
            for (let i=a; i>b-1; i--) {
                answer += i;
            }
        }
        return answer;
    }
}