프로그래머스 Java / Ruby : 문자열 다루기 기본

https://school.programmers.co.kr/learn/courses/30/lessons/12918

프로그래머스

---

 

- Java

class Solution {
    public boolean solution(String s) {
        boolean answer = false;
        if(s.length()==4||s.length()==6){
            for(int i=0;i<s.length();i++)
                if(s.charAt(i)<'0'||s.charAt(i)>'9')
                    return answer;
            answer=true;
        }
        return answer;
    }
}

 

 

- Ruby

def solution(s)
    answer = false
   if s.length == 4 or s.length ==6
       b=0
       for i in 0..(s.length-1)
           if s[i].ord>=48 and s[i].ord<=57
               b=b+1
           end
       end
   end
    if(b==s.length)
        answer=true
    end
    return answer
end