Convertir letras mayúsculas a minúsculas y viceversa en 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)
Homeless Hawk