How to Initialize Array to 0 in C?

// C program to initialize an array to zero at declaration
#include <stdio.h>

int main()
{
    // Using an initializer list
    int arr1[5] = { 0 };

    // Setting the first element to zero
    int arr2[5] = {
        0
    }; // All elements are implicitly initialized to zero

    // Print the arrays
    for (int i = 0; i < 5; i++) {
        printf("%d ", arr1[i]);
    }
    printf("\n");

    for (int i = 0; i < 5; i++) {
        printf("%d ", arr2[i]);
    }
    printf("\n");

    return 0;
}

// C program to initialize an array to zero after
// declaration
#include <stdio.h>
#include <string.h>

int main()
{
    int arr[5];

    // Using a loop
    for (int i = 0; i < 5; i++) {
        arr[i] = 0;
    }

    // Using memset()
    memset(arr, 0, sizeof(arr));

    // Print the array
    for (int i = 0; i < 5; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");

    return 0;
}