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def swap_case(s):
result = ""
for char in s:
if char.islower(): # lowercase → uppercase
result += char.upper()
elif char.isupper(): # uppercase → lowercase
result += char.lower()
else: # other chars → unchanged
result += char
return result
if name == 'main':
s = input()
result = swap_case(s)
print(result)
def swap_case(s): return s.swapcase()
if name == 'main': s = input() result = swap_case(s) print(result)
def swap_case(s): for char in s: if char.islower(): yield char.upper() elif char.isupper(): yield char.lower() else: yield char return ''.join(swap_case(s)) swap_case = lambda s: ''.join(char.upper() if char.islower() else char.lower() for char in s) print(swap_case("Hello World")) # Example usage
def swap_case(s): result = "" for char in s: if char.islower(): # lowercase → uppercase result += char.upper() elif char.isupper(): # uppercase → lowercase result += char.lower() else: # other chars → unchanged result += char return result
if name == 'main': s = input() result = swap_case(s) print(result)
def swap_case(s):
if name == 'main':