What is the value of a[1] after the following code is executed?int[] a = {0, 2, 4, 1, 3};for(int i = 0; i < a.length; i++)a[i] = a[(a[i] + 3) % a.length];0123
Question
What is the value of a[1] after the following code is executed?int[] a = {0, 2, 4, 1, 3};for(int i = 0; i < a.length; i++)a[i] = a[(a[i] + 3) % a.length];0123
Solution
The given code is in Java. Let's break it down:
-
An integer array
ais declared and initialized with the values{0, 2, 4, 1, 3}. -
A for loop is set up to iterate over the length of the array
a. -
Inside the loop, each element of the array
aat indexiis reassigned to the value of the element at the index(a[i] + 3) % a.length.
Let's go through the loop:
-
For
i = 0,a[0]is reassigned toa[(0 + 3) % 5]which isa[3]. So,a[0]becomes1. -
For
i = 1,a[1]is reassigned toa[(2 + 3) % 5]which isa[0]. So,a[1]becomes1. -
For
i = 2,a[2]is reassigned toa[(4 + 3) % 5]which isa[2]. So,a[2]remains4. -
For
i = 3,a[3]is reassigned toa[(1 + 3) % 5]which isa[4]. So,a[3]becomes3. -
For
i = 4,a[4]is reassigned toa[(3 + 3) % 5]which isa[1]. So,a[4]becomes1.
So, after the code is executed, the array a becomes {1, 1, 4, 3, 1}.
Therefore, the value of a[1] is 1.
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