Learn String Manipulation by Building a Cypher - Step 42

This lesson is asking:

Now, instead of printing 'space!' , use the addition assignment operator to add the space (currently stored in char ) to the current value of encrypted_text .

I have already deleted the ‘space!’

But then it show the message:

You should use the += operator to add char to the current value of encrypted_text inside your new if statement.

And I don’t get what to do, the instruction is not clear, can someone tell me step by step what should I do of can someone show me how the code is supposed to be.

I will put the code here below to show where I’m stuck:

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)

You still need some sort of body to this if statement.

Where are you doing this?