83 8 Create Your | Own Encoding Codehs Answers Exclusive

Because it uses 4 bits, every single character must be represented by exactly four 1s and 0s. This fixed-length approach makes decoding much easier because you can read the binary string in predictable chunks. Our Sample Encoding Dictionary: →right arrow 0000 B →right arrow 0001 C →right arrow 0010 D →right arrow 0011 E →right arrow 0100 H →right arrow 0101 L →right arrow 0110 O →right arrow 0111 R →right arrow 1000 W →right arrow 1001 [Space] →right arrow 1111

function encode(message) var reversedMessage = message.split("").reverse().join(""); var encodedMessage = ""; for (var i = 0; i < reversedMessage.length; i++) var charCode = reversedMessage.charCodeAt(i); if (charCode >= 65 && charCode <= 90) // Uppercase letters var encodedCharCode = (charCode - 65 + 3) % 26 + 65; else if (charCode >= 97 && charCode <= 122) // Lowercase letters var encodedCharCode = (charCode - 97 + 3) % 26 + 97; else // Non-alphabet characters var encodedCharCode = charCode;

The exercise requires A-Z and the space character to be represented. 83 8 create your own encoding codehs answers exclusive

: Autograders verify exact string outputs. Check whether your program requires space delimiters between bit blocks (e.g., 00000 00101 ) or a continuous compressed data stream.

: Using loops to examine every single character in the input text. Because it uses 4 bits, every single character

You must include a mapping for letters A-Z. Represent Space: You need a code for the space character.

[ Plaintext Input ] ---> [ Apply Shift/Rules ] ---> [ Encoded String ] ^ | | v [ Original Text ] <--- [ Reverse Shift/Rules ] <--- [ Decode Function ] The Rule We Will Implement Convert each character to its Unicode/ASCII value. Add a specific numeric shift to that value (e.g., +4). Convert that new number back into a character. : Autograders verify exact string outputs

# Split the binary string into 5‑bit chunks result = [] for i in range(0, len(binary_string), 5): chunk = binary_string[i:i+5] if chunk in decode_map: result.append(decode_map[chunk]) return ''.join(result)

Computers store text as numbers. Standards like ASCII assign a unique integer (0–127) to each character. Exercise 8.3.8 in CodeHS challenges students to — mapping letters, spaces, and maybe punctuation to binary strings — and to write functions encode and decode .