This code defines a function `array_sum` that calculates the sum...

This code defines a function array_sum that calculates the sum of the elements in an array of integers. Here’s a breakdown of what it does:

1. Include Headers:

   • #include <stdio.h>: Includes the standard input/output library (not directly used in this snippet but commonly used for printing/debugging).
   • #include <stdint.h>: Includes fixed-width integer type definitions (int32_t, uint32_t).

2. Function Definition:

   • int32_t array_sum(int32_t *arr, uint32_t n): Defines a function named array_sum that takes the following parameters:

     • int32_t *arr: A pointer to an integer array of 32-bit signed integers.
     • uint32_t n: An unsigned 32-bit integer specifying the number of elements in the array.

   • The function returns an int32_t (a 32-bit signed integer).

3. Variable Initialization:

   • int32_t r = 0;: Initializes a variable r to zero. r will store the running total (sum of array elements).

4. For Loop:

   • for (int i = 0; i < n; i++): A loop that iterates over the array elements.
     • i starts at 0.
     • The loop continues until i is less than n (the number of elements in the array).
     • i increments by 1 at the end of each iteration.

5. Summation:

   • Inside the loop, r += arr[i]; adds the i-th element of the array (arr[i]) to r.

6. Return Statement:

   • After the loop, return r; returns the total sum of all array elements.

Summary:

The function array_sum accepts an array of signed 32-bit integers and its size (n), iterates through the array, computes the sum of all its elements, and returns the total.