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Given answer, B, is correct. But keep in mind too that even if the 'for' statement is corrected, the string is immutable, so assigning a new value to s[i] will fail with "'str' object does not support item assignment. HTH
strings can actually be modified by this type of loop. But the loop itself doesn't work, because it's just one number, 3. If it was iterable, it would have worked. Try running this:
s='abc'
for i in s:
s=s.upper()
print(s)
s is iterable, so the result is 'ABC'
Even if the code were
s="abc"
for i in range(len(s)):
>>>>s[i] = s[i].upper()
print(s)
it would still throw error as below:
Traceback (most recent call last):
File "<string>", line 5, in <module>
TypeError: 'str' object does not support item assignment
which was my initial thought
>>> s="abc"
>>> for s in len(s):
... s[i] = s[i].upper()
...
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable
upvoted 3 times
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