<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Describe how to use the following code to calculate the sum of all elements in an array in Java.
public static int calcSum(int[] arr) {
    int sum = 0;
    for (var i = 0; i < arr.length; i++) {
        sum += arr[i];
    }
    return sum;
}<|im_end|>
<|im_start|>assistant
// To calculate the sum of all elements in an array using the code provided:
// 1. Initialize the array of integers to be summed
// 2. Use the calcSum function to iterate over the array and sum all of its elements
// 3. Return the calculated sum from the calcSum function<|im_end|>
