How to iterate through an array in the C language?

In C language, loop structures can be used to iterate through arrays. Here are two commonly used methods for iterating over arrays.

1. Traverse the array using a for loop.

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int length = sizeof(arr) / sizeof(arr[0]);  // 计算数组长度
    for (int i = 0; i < length; i++) {
        printf("%d ", arr[i]);
    }
    return 0;
}

1. Traverse the array using pointers.

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int length = sizeof(arr) / sizeof(arr[0]);  // 计算数组长度
    int *ptr = arr;  // 定义指向数组的指针
    for (int i = 0; i < length; i++) {
        printf("%d ", *(ptr + i));
    }
    return 0;
}

It is important to pay attention to the boundary conditions of the array when using any traversal method to prevent accessing out of bounds.