Input a string and determine whether it is a palindrome or not; convert the case of characters in a string CBSE Python

Input a string and determine whether it is a palindrome or not; convert the case of characters in a string

# Python Program to check whether string is palindrome or not

str=input("Enter a string:")
w=""
for element in str[::-1]:
    w = w+element

if (str==w):
    print(str, 'is a Palindrome string')
else:
    print(str,' is NOT a Palindrome string')

Output:

Enter a string:"welcome"
('welcome', ' is NOT a Palindrome string')
>>>

Enter a string:"kanak"
('kanak', 'is a Palindrome string')
>>>

# Python Program to convert the case of characters in a string

str=input("Enter a string:")
w=""
for element in str[::1]:
    if element.isupper():
        w = w+element.lower()
    else:
        w = w+element.upper()
print(w)

Output:

Enter a string:"Welcome to cbsepython.in. BEST website to CBSE Computer Science"
wELCOME TO CBSEPYTHON.IN. best WEBSITE TO cbse cOMPUTER sCIENCE
>>>