bky373 · September 7, 2020 15:47
diff --git a/programmers-문자열 다루기 기본 b/programmers-문자열 다루기 기본
 class Solution {
    fun solution(s: String): Boolean {
        val chars = s.toCharArray()
        return chars.all{ it.isDigit() } && (chars.size == 4 || chars.size == 6)
    }
 }
	class Solution {
	fun solution(s: String): Boolean {
	val chars = s.toCharArray()
	return chars.all{ it.isDigit() } && (chars.size == 4 \|\| chars.size == 6)
	}
	}