Convert Between Characters and ASCII Codes in Python with chr() and ord()

Convert Between Characters and ASCII Codes in Python with chr() and ord() 🔡

Python makes it easy to switch between characters and their numeric ASCII/Unicode representations using the built-in chr() and ord() functions. These are useful for encryption, sorting, character arithmetic, and more.

✅ Character to ASCII: ord()

# Character → ASCII code
print(ord('A'))  # 65
print(ord('a'))  # 97

✅ ASCII to Character: chr()

# ASCII code → Character
print(chr(65))   # 'A'
print(chr(97))   # 'a' 

✅ Loop through the alphabet

# Print all uppercase letters A-Z
for i in range(ord('A'), ord('Z') + 1):
    print(chr(i), end=' ')  # A B C ... Z

✅ Simple Caesar cipher example

# Simple Caesar cipher (uppercase only)
def caesar_encrypt(text, shift):
    result = ''
    for char in text:
        if char.isupper():
            result += chr((ord(char) - 65 + shift) % 26 + 65)
        else:
            result += char
    return result

print(caesar_encrypt("HELLO", 3))  # KHOOR

chr() and ord() are core tools for any developer working with character data, encoding, or algorithms. They're also helpful in many Python coding interviews and challenges.

Every character has a number. Once you master chr() and ord(), you'll unlock powerful string manipulation in Python. 🚀

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