[Solved] The following code is intended to print all elements of the array data, but it causes a runtime error. What is the error?int[] data = {10, 20, 30}; for (int i = 1; i | Java

Java - Arrays

The following code is intended to print all elements of the array data, but it causes a runtime error. What is the error?

int[] data = {10, 20, 30};
for (int i = 1; i <= data.length; i++) {
    System.out.println(data[i]);
}

AArrayIndexOutOfBoundsException because loop goes beyond last index

BSyntax error due to wrong for loop syntax

CPrints all elements correctly

DNullPointerException because array is not initialized

Step-by-Step Solution

Solution:

Step 1: Analyze loop indices and array length
The array has length 3, valid indices are 0, 1, 2. The loop runs i from 1 to 3 inclusive.
Step 2: Identify index causing error
When i = 3, data[3] is accessed, which is out of bounds and causes ArrayIndexOutOfBoundsException.
Final Answer:
ArrayIndexOutOfBoundsException because loop goes beyond last index -> Option A
Quick Check:
Loop index must be less than length [OK]

Quick Trick: Loop indices must be 0 to length-1 for arrays [OK]

Common Mistakes:

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The following code is intended to print all elements of the array data, but it causes a runtime error. What is the error?