[Programmers] - 시저 암호 (Level 1)

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연습문제
LEVEL : 1
문제링크

s = "a B z"
n = 4

def solution(s, n):
    low = 'abcdefghijklmnopqrstuvwxyz'*2
    up = low.upper()

    answer =[]
    for i in range(len(s)):
        if s[i] == ' ':
            answer.append(' ')
        elif s[i] in low:
            answer.append(low[low.index(s[i])+n])
        elif s[i] in up:
            answer.append(up[up.index(s[i])+n])


    return ''.join(answer)

solution(s,n)

'e F d'