PCAP Exam - Question 17

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

String is immutable

>>> 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

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

[TypeError: 'int' object is not iterable] is returned because len(s) is an int - you can't iterate an int - it's not a collection data type.

should be for i in range(len... B. The code will cause a runtime exception

It causes an exception because the string s is imutable so attempting to assign to s[i] will fail, however s[i].upper() will succesed

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'

Yes, Type Error. Answer is B