Array Loop Boundary Error

Question

What error is present in the calculateAverage method above?
 
```java
public class AverageCalculator {
    public static double calculateAverage(int[] arr) {
         int sum = 0;
         for (int i = 0; i <= arr.length; i++) {
             sum += arr[i];
         }
         return sum / arr.length;
    }
}
```

Accepted Answer

The loop condition uses '<=' instead of '<', resulting in an ArrayIndexOutOfBoundsException.

Answer

The method should use an enhanced-for loop to correctly accumulate the sum.

Answer

The variable 'sum' is not initialized properly before the loop.

Answer

The method returns an integer value due to integer division, causing precision issues.

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