HackerRank Python Solution - Strings - sWAP cASE

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 s.

Constraints:

• 0 < len(s) <= 1000

Sample Input:

HackerRank.com presents "Pythonist 2".

Sample Output:

hACKERrANK.COM PRESENTS "pYTHONIST 2".

Solution:

def swap_case(s):
    ans=""
    for i in s:
        if i.isupper():
            ans+=i.lower()
        elif i.islower():
            ans+=i.upper()
        else:
            ans+=i
    return ans

if __name__ == '__main__':
    s = input()
    result = swap_case(s)
    print(result)    

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