[PYTHON] Character code

Introduction

I would like to summarize what I learned a little from studying atcoder.

ASCII Do you know about character codes? According to Wikipedia

A character code is provided for each character (may not be a single character) when a sentence is handled in the form of text rather than as graphic data such as an image in an electronic medium such as a computer. It's a code. (wikipedia)

There is. Simply put, it's like a rule (code) for expressing characters on a computer. As a type

That's about it. I think there are many people who have seen UTF-8.

Atcoder146 B - ROT N

Problem statement There is a string S consisting only of uppercase letters. It is also given the integer N. Output a character string in which each character of S is replaced with the character after N in alphabetical order. However, the letter after Z in alphabetical order is regarded as A.

I used the ASCII idea above in solving this problem.

test.py

N = int(input())
S = input()
def change():
    s=[]
    for i in range(len(S)):
        m = ((ord(S[i])-ord("A")+N) % 26)
        s.append(chr(m+ord("A")))
    return "".join(s)
print(change())

Please forgive me for the dung code (laughs) The most important thing here is ʻOrd ()andchr ()` functions. This function is a function that converts letters and numbers written in ASCII into pre-assigned numbers and letters. [ASCII code]: http://www12.plala.or.jp/mz80k2/electronics/ascii/ascii.html For example, the letter "A" is ** 65 ** according to the ASCII character code. Also, if you use a function chr("a")I write it like this. On the contrary, if you want to assign a number to asciiord(65)It will be like that.

At the end

There are various character codes, so it's interesting to study! !!