sum of list in C

Calculating the Sum of a List in C

To calculate the sum of a list in C, you can use a loop to iterate through each element of the list and add them together. Here's an example code snippet that demonstrates this:

#include <stdio.h>

int main() {
    int list[] = {1, 2, 3, 4, 5};
    int size = sizeof(list) / sizeof(list[0]);
    int sum = 0;

    for (int i = 0; i < size; i++) {
        sum += list[i];
    }

    printf("The sum of the list is: %d\n", sum);

    return 0;
}

Let's break down the code and explain each step:

  1. Include the necessary header file: In this case, we include the <stdio.h> header file, which provides the necessary functions for input and output operations.

  2. Declare and initialize the list: We declare an integer array called list and initialize it with some values. In this example, we have a list of integers: {1, 2, 3, 4, 5}.

  3. Calculate the size of the list: We calculate the size of the list by dividing the total size of the list by the size of a single element. This is done using the sizeof operator.

  4. Initialize the sum variable: We declare an integer variable called sum and initialize it to 0. This variable will store the sum of the list elements.

  5. Iterate through the list: We use a for loop to iterate through each element of the list. The loop variable i starts from 0 and goes up to size - 1.

  6. Add each element to the sum: Inside the loop, we add each element of the list to the sum variable using the += operator.

  7. Print the sum: Finally, we use the printf function to print the sum of the list.

When you run this code, it will output:

The sum of the list is: 15

This means that the sum of the elements in the list {1, 2, 3, 4, 5} is 15.

I hope this explanation helps! Let me know if you have any further questions.