This code calculates the sum of elements in the array...

This code calculates the sum of elements in the array a at positions (indices) that are divisible by 3 (i.e., indices 0, 3, 6, etc.). It then prints the resulting sum. Here's a detailed explanation:

1. Array Initialization: An array a containing integers {2, 6, 8, 10, 12, 14, 16, 18} is declared.
2. Variable Initialization: A variable sum is set to 0 to store the cumulative sum of chosen elements.
3. Looping Through the Array:
   • A for loop iterates over the array a from index 0 to a.length - 1.
   • Inside the loop, it checks if the current index i is divisible by 3 using the condition i % 3 == 0.
   • If the condition is true, it adds the value of a[i] (the element at index i) to the variable sum.
4. Output: After the loop is complete, it prints the value of sum.

Steps in Execution:

• Index 0: i % 3 == 0 (true), so add a[0] (2) to sum. sum = 2.
• Index 3: i % 3 == 0 (true), so add a[3] (10) to sum. sum = 12.
• Index 6: i % 3 == 0 (true), so add a[6] (16) to sum. sum = 28.
• Other indices do not satisfy i % 3 == 0, so they are skipped.

The final sum is 28, which is printed to the console.