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Resolves issue #12306 #12319

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Resolves issue #12306 #12319

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4879a46
Fix number of rotations `N` as 13 (Resolves TheAlgorithms#12306)
Y-Srivaishnavi Oct 29, 2024
5efef35
Add input validation and change function name to `apply_rot13`
Y-Srivaishnavi Oct 29, 2024
2bef9b9
Update documentation
Y-Srivaishnavi Oct 29, 2024
92d58b7
Add `.split
Y-Srivaishnavi Oct 29, 2024
3a98cda
Change `N` into lowercase
Y-Srivaishnavi Oct 29, 2024
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Fix number of rotations N as 13 (Resolves #12306)
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@Y-Srivaishnavi
Y-Srivaishnavi authored Oct 29, 2024
commit 4879a46be1c056cceb46be12155796a75f070c68
7 changes: 4 additions & 3 deletions ciphers/rot13.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
def dencrypt(s: str, n: int = 13) -> str:
def dencrypt(s: str) -> str:
"""
https://en.wikipedia.org/wiki/ROT13

Expand All @@ -9,12 +9,13 @@ def dencrypt(s: str, n: int = 13) -> str:
>>> dencrypt(s) == msg
True
"""
N = 13
out = ""
for c in s:
if "A" <= c <= "Z":
out += chr(ord("A") + (ord(c) - ord("A") + n) % 26)
out += chr(ord("A") + (ord(c) - ord("A") + N) % 26)
elif "a" <= c <= "z":
out += chr(ord("a") + (ord(c) - ord("a") + n) % 26)
out += chr(ord("a") + (ord(c) - ord("a") + N) % 26)
else:
out += c
return out
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