Question at position 16 In the following program, which line of code would cause an error when this program is executed with the following inputs in this order: Ehab, 13 1 name = input("Please enter your name: ")2 number = input("Please enter your favourite number: ")3 combined = name + number4 combined = combined + 25 lucky_character = combined[0]6 print(lucky_character)3254Clear my selection单项选择题
A
3
B
2
C
5
D
4

Question

Question at position 16 In the following program, which line of code would cause an error when this program is executed with the following inputs in this order: Ehab, 13 1 name = input("Please enter your name: ")2 number = input("Please enter your favourite number: ")3 combined = name + number4 combined = combined + 25 lucky_character = combined[0]6 print(lucky_character)3254Clear my selection单项选择题

A

3

B

2

C

5

D

4

BlackTom AI · Accepted Answer

To reason through which line would cause an error, let's first map the code lines to their actions given the inputs: name = input(...) will capture the string 'Ehab', and number = input(...) will capture the string '13 1'.
Line-by-line analysis:
- Line 3: combined = name + number. Since both name and number are strings ('Ehab' and '13 1'), this line concatenates two strings successfully, producing 'Ehab13 1'. Therefore, Line 3 does not cause an error.
- Line 2: number = input(...). This line simply reads input as a string; there is no operation here that would cause an error by itself, so Line 2 is not the source of an error.
- Line 5: lucky_character = combined[0]. Indexing a string to get its first character is valid in Python, so this line would work after Line 3 executes. Thus Line 5 is not the error.
- Line 4: combined = combined + 25. Here, we attempt to add an integer (25) to a string (combined). Python does not allow implicit concatenation of str and int, so this line will raise a TypeError at runtime. This is the error-causing line.
- Line 6: print(lucky_character) would execute only if prior lines succeeded; since Line 4 raises an error, Line 6 is never reached.
Now, evaluating the provided options: options '3', '2', '5', and '4' correspond to the lines
a) 3 — would not error (string + string works).
b) 2 — not an error (input returns a string, no operation).
c) 5 — not an error (string indexing is valid).
d) 4 — this is the line that attempts to add an int to a string, causing a TypeError.
Thus, the line that would cause an error is the one labeled '4'.

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