removing a letter from a sentence

[mike Andrews]

I am trying to remove every other letter from a sentence that I input just by using a for loop. This code however just reprints the sentence

def removeLetter(sentence):
    index=0
    for letter in sentence:
        index=index+1
        if index%2==0:
            letter=""
            sentence=sentence+letter
            return sentence

[bvdet]

You assign letter to a null string and then add it to sentence, in effect doing nothing. The following code uses a list comprehension to create a list of the letters you want to keep, then joins the letters into a new abbreviated sentence.

>>> s = "This is a test sentence."
>>> "".join([letter for i, letter in enumerate(s) if not i%2])
'Ti sats etne'
>>>

[dwblas]

You have to add the desired letters to a new string, or convert the original string to a list. Note also that the return statement doesn't have the correct indent.

def removeLetter(sentence):
    index=0
    new_sentence = ""
    for letter in sentence:
        index=index+1
        if index%2==0:
            new_sentence += letter
    return new_sentence