How to make a function that concatenetes strings in python

Question

I'm taking the codeacademy course and it asks me the following:

Define a function called join_strings accepts an argument called words. It will be a list. Inside the function, create a variable called result and set it to "", an empty string. Iterate through the words list and append each word to result. Finally, return the result. Don't add spaces between the joined strings!

So what I did is:

def join_strings(words):
    result = ""
    for i in range(len(words)):
        result = words
    return result

But the console prints me:

Oops, try again. join_strings(['x', 'y', 'z', 'a']) returned ['x', 'y', 'z', 'a'] instead of 'xyza'

No, you didn't do that, that code would not return anything but crash on the return. — Antti Haapala
– Antti Haapala, Commented Mar 16, 2015 at 6:07

backtrack · Accepted Answer · 2015-03-16 06:13:59Z

2

def join_strings(words):
    result = ""
    for i in words:
        result += i
    return result

you have missed this result += words concatenation part and return result

you have to use this

for i in words:
            result += i

Update

def join_strings(words):
    result = ""
    for i in words:
        result += i
    return result

g= join_strings(['x', 'y', 'z', 'a'])

print(g)

o/p : xyza

From your post :

def join_strings(words):
    result = ""
    for i in range(len(words)):
        result += words[i]
    return result

g= join_strings(['x', 'y', 'z', 'a'])

print(g)

You have to use the index value of the word. Since you are getting the range and iterating you have to specify the index result += words[i]

edited Mar 16, 2015 at 6:13

answered Mar 16, 2015 at 6:07

backtrack

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1 Comment

backtrack Over a year ago

Those who downvoted please tell me the reason. I am getting the proper o/p. why did you downvoted then ?

Terry Jan Reedy · Accepted Answer · 2015-03-16 06:41:12Z

1

Try this one:

def join_strings (words):
    result = ""
    for i in words:
        result += i
    return result

Basically, we have an empty string. We can add more to this string by using the += operator. This operator is short for saying x = x + y.

edited Mar 16, 2015 at 6:41

Terry Jan Reedy

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answered Mar 16, 2015 at 6:07

Abe Malla

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1 Comment

mhawke Over a year ago

Get rid of the unnecessary semi-colons.

kenorb · Accepted Answer · 2015-03-16 11:51:44Z

0

Try the following code:

from operator import add
def join_strings(words):
    return reduce(add, words)

edited Mar 16, 2015 at 11:51

kenorb

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answered Mar 16, 2015 at 6:47

Dinesh Panchananam

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2 Comments

Terry Jan Reedy Over a year ago

This does not satisfy the assignment, which is, essentially, to write the join function

J Richard Snape Over a year ago

Code only answers are generally discouraged unless they answer the question in full and are "self documenting" (contentious term). This answer doesn't follow the method outlined in the brief and isn't self documenting, so I don't think it fulfils those criteria.

Aj-G · Accepted Answer · 2017-03-10 16:49:27Z

-1

The following has worked for me:

n = ["Michael", "Lieberman"]

Add your function here

def join_strings(words):
    result = ""
    for i in range(len(words)):
        result += words[i]
    return result

print join_strings(n)

answered Mar 10, 2017 at 16:49

Aj-G

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1 Comment

David de la Iglesia Over a year ago

Please avoid posting an answer wich is identical to another previously posted.

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