I have to print out every third letter of a text with spaces between and none at the end. I can do everything but the spaces between each of the letters.
Here is what I have.
line = input('Message? ')
print(line[0]+line[3::3].strip())
To join things with spaces, use join(). Consider the following:
>>> line = '0123456789'
>>> ' '.join(line[::3])
'0 3 6 9'
Since you're using Python 3, you can use * to unpack the line and send each element as an argument to print(), which uses a space as the default separator between arguments. You don't need to separate line[0] from the rest - you can include it in the slice ([0::3]), or it'll be used by default ([::3]). Also, there's no need to use strip(), as the newline character that you send with Enter is not included in the string when you use input().
print(*input('Message? ')[::3])
print() function with a clear explanation. Why the downvote?
print(), which prints them with a space separator as the question specifies.[1, 2, 3]