CODEWITHSUNDEEP
python
Hee Ra Choi
Hee Ra Choi

Reputation: 113

Python: mix the letter of each word and reverse

Given the strings s1 and s2 that are of the same length, creating a new string consisting of the last character of s1 followed by the last character of s2, followed by the second to last character of s1, followed by the second to last character of s2, and so on (In other words the new string should consist of alternating characters of the reverse of s1 and s2).

For example, if s1 contained hello and s2 contained world, then the new string should contain odlllreohw. Assign the new string to the variable s3.

I have done this far:

s3 = ""
for i in range(len(s1)):
    s3 = s2.reverse[i] + s1.reverse[i]

Where should I fix it?

Upvotes: 1

Views: 1287

Answers (3)

Harry
Harry

Reputation: 318

This solution will work for python2

str1 = "hello"
str2 = "world"

for i,j in reversed(zip(str1,str2)):
     print i,j,

for python3 you should reverse strings individually

for i,j in zip(str1[::-1],str2[::-1]):

Upvotes: 2

Kaushik NP
Kaushik NP

Reputation: 6781

Following your code structure, just reverse the strings and add them one-by-one :

s1=s1[::-1]                   #reverse string s1
s2=s2[::-1]                   #reverse string s2
s3 = "" 

for i in range(len(s1)):
    s3 += s1[i]+s2[i]         #add from both strings letter-wise

#driver values

IN : s1="hello"
IN : s2="world"
OUT : 'odlllreohw'

Upvotes: 1

adder
adder

Reputation: 3698

>>> str1 = 'hello'
>>> str2 = 'world'
>>> my_str = ''.join(y for x in zip(str1[::-1], str2[::-1]) for y in x)
>>> my_str
odlllreohw

...you can use reversed(), as well.

Upvotes: 3

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