switch letter case python code example
Example: converting capital letters to lowercase and viceversa in python
s=input()
new_str=""
for i in range (len(s)):
if s[i].isupper():
new_str+=s[i].lower()
elif s[i].islower():
new_str+=s[i].upper()
else:
new_str+=s[i]
print(new_str)