Learn String Manipulation by Building a Cipher - Step 39

Python
1

Tell us what’s happening:

Describe your issue in detail here.
not sure exactly where to place the addition assignment operator

Your code so far


/* User Editable Region */

text = 'Hello World'
shift = 3
alphabet = 'abcdefghijklmnopqrstuvwxyz'
encrypted_text = ' '

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

/* User Editable Region */

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 39

2

Hi @moh_alkukhun! Welcome to the freeCodeCamp forum.

It looks like you have removed the line of print('space!'). Now, replacing that code, you need to write a code to add the space to the current value of encrypted_text.

text = 'Hello World'
shift = 3
alphabet = 'abcdefghijklmnopqrstuvwxyz'
encrypted_text = ''

for char in text.lower():
    if char == ' ':
        // write a code here to add the space to the current value of encrypted_text
    index = alphabet.find(char)
    new_index = index + shift
    encrypted_text += alphabet[new_index]
    print('char:', char, 'encrypted text:', encrypted_text)

You will need to use the addition assignment operator (+=) in that line.

This line below may give you a hint on how to use it:

encrypted_text += alphabet[new_index]
1 Like
3

can i have another hint
i tried — encrypted_text += " " —
but is wrong

4

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Thank you.

5

I also tried with:
encrypted += ’ ’
but it works with:
encrypted += char

6

If char==' ',

+= ' '

is equivalent to

+= char

But the latter is deemed the correct one, apparently for using the same line for cases of other non-letter characters later.

7

Exactly, both answers are similar. But in this case, the “correct” answer is += char because we use the same variable (char) that we created in the for loop to iterate over each character of the text. In short, for order and coherence.

1 Like
8

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