--description--

When the loop reaches the letter Z, the sum index + shift exceeds the last index of the string alphabet. Therefore, alphabet[new_index] is trying to use an invalid index, which causes an IndexError to be thrown.

You can notice that the output in the terminal stops at the space immediately before the Z, the last print before the error is thrown.

In this case, the modulo operator (%) can be used to return the remainder of the division between two numbers. For example: 5 % 2 is equal to 1, because 5 divided by 2 has a quotient of 2 and a remainder of 1.

Surround index + shift with parentheses, and modulo the expression with 26, which is the alphabet length.

--hints--

You should have new_index = (index + shift) % 26 in your else statement.

const commentless_code = __helpers.python.removeComments(code);  
const {block_body} = __helpers.python.getBlock(commentless_code, /else/);
assert(block_body.match(/new_index\s*=\s*\(\s*index\s*\+\s*shift\s*\)\s*%\s*26/));

Your code contains invalid syntax and/or invalid indentation.

({test: () => assert(true) })

--seed--

--seed-contents--

--fcc-editable-region--
text = 'Hello Zaira'
shift = 3
alphabet = 'abcdefghijklmnopqrstuvwxyz'
encrypted_text = ''

for char in text.lower():
    if char == ' ':
        encrypted_text += char
    else:
        index = alphabet.find(char)
        new_index = index + shift
        encrypted_text += alphabet[new_index]
    print('char:', char, 'encrypted text:', encrypted_text)
--fcc-editable-region--