요일 알아내기

private fun doDayOfWeek(): String? {
    val cal: Calendar = Calendar.getInstance()
    var strWeek: String? = null
    val nWeek: Int = cal.get(Calendar.DAY_OF_WEEK)

    if (nWeek == 1) {
        strWeek = "일"
    } else if (nWeek == 2) {
        strWeek = "월"
    } else if (nWeek == 3) {
        strWeek = "화"
    } else if (nWeek == 4) {
        strWeek = "수"
    } else if (nWeek == 5) {
        strWeek = "목"
    } else if (nWeek == 6) {
        strWeek = "금"
    } else if (nWeek == 7) {
        strWeek = "토"
    }
    return strWeek
}