HackerRank sWAP cASE problem solution in python | python problem solution

 You are given a string and your task is to swap cases. In other words, convert all lowercase letters to uppercase letters and vice versa.

For Example:

Www.HackerRank.com → wWW.hACKERrANK.COM
Pythonist 2 → pYTHONIST 2  

Function Description

Complete the swap_case function in the editor below.

swap_case has the following parameters:

• string s: the string to modify

Returns

• string: the modified string

Input Format

A single line containing a string .

Constraints

Sample Input 0

HackerRank.com presents "Pythonist 2".

Sample Output 0

hACKERrANK.COM PRESENTS "pYTHONIST 2".

Problem solution in Python 2 programming.
# Enter your code here. Read input from STDIN. Print output to STDOUT
name = raw_input()
print ''.join(c.lower() if c.isupper() else c.upper() for c in name)

Problem solution in Python 3 programming.
def swap_case(s):
    return s.swapcase()


Problem solution in pypy programming.
def swap_case(s):
    res = ''
    for ch in s:
        if ch.isupper():
            res += ch.lower()
        else:
            res += ch.upper()
    return res

Problem solution in pypy3 programming.
def swap_case(s):
    result = []
    for letter in s:
        if letter == letter.lower():
            result.append(letter.upper())
        elif letter == letter.upper():
            result.append(letter.lower())
        else:
            result.append(letter)
    return ''.join(result)