Replace XXX and YYY in the for loop code to get the same logic as given in the while loop.

While loop:

For loop:

for (XXX)
{
YYY
}

XXX int idx = 0; idx

Question

Replace XXX and YYY in the for loop code to get the same logic as given in the while loop.

While loop:

For loop:

for (XXX) 
{
    YYY
}

XXX                 int idx = 0; idx < arr.length; idx++

YYY                 arr[idx] = arr[idx] + (idx % 2);

BlackTom AI · Accepted Answer

To translate the given while-loop logic into a for-loop, we need to fill two slots in the for(header) and the for(body).

Option 1: int idx = 0; idx < arr.length; idx++
- This clearly corresponds to the for-loop header components: initialization (idx = 0), loop continuation condition (idx < arr.length), and the update expression after each iteration (idx++). The while loop initializes idx to 0, checks idx < arr.length each iteration, and increments idx by 1 inside the loop body; the for-header version mirrors these same mechanics, ensuring we traverse the array from start to end and advance by one index per iteration.

Option 2: arr[idx] = arr[idx] + (idx % 2);
- This line is a direct translation of the assignment performed inside the while-loop body. It reads the current element at position idx, adds the parity-based increment (idx % 2), and writes the result back to the same element. This exactly preserves the intended behavior: elements at even indices receive 0 addition, while odd indices receive 1, matching the given while-loop logic.

Why the other interpretations would be incorrect:
- If you swapped the roles or used a different condition like idx <= arr.length, you would either miss the last element or exceed array bounds, breaking the logic.
- If the update expression were something else (e.g., idx = idx + 2), the loop would skip elements or run fewer iterations, diverging from the while-loop sequence.
- If the body used a different operation (e.g., arr[idx] += 1), the resulting array would not match the original intended update pattern driven by (idx % 2).

In summary, using the exact two replacements provided ensures the for-loop behaves the same as the given while-loop: it iterates from index 0 to arr.length - 1, and for each index, updates arr[idx] by adding (idx % 2).

CSE 1223 SP2025 (37178) Quiz: Week 08

Replace XXX and YYY in the for loop code to get the same logic as given in the while loop. While loop: For loop: for (XXX) { YYY } XXX int idx = 0; idx < arr.length; idx++ YYY arr[idx] = arr[idx] + (idx % 2);

查看解析

登录即可查看完整答案

类似问题

Consider the code below. What value will be displayed? int total = 0; for (int i = 1; i <= 4; i++) { if (i % 2 == 0) total += i; } MessageBox.Show(total.ToString());

Which of the following is the proper syntax to loop through every other value of a row vector x?

Given a list values that contains the first ten prime numbers, which statement does NOT print each element in the list?

Which of the following for loops will run the loop body 5 times?

What is the value of j at the end of the following code segment? j = 0 for i in range(0, 4) : j = j + i

Which of the following for loops will run the loop body 5 times?

You would typically use a for loop to iterate over the elements in a set.

What is the correct code for a for loop that meets the following conditions? ● Runs when the value of NumA is less than 10 ● Increases the value of NumA by 1 every time the loop runs ● Initial value of NumA = 5

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单