array length c++

The length of a C++ array can be obtained using the sizeof operator. Here's an example:

int arr[] = {1, 2, 3, 4, 5};
int length = sizeof(arr) / sizeof(arr[0]);

In this example: - Define an array of integers arr with some values. - Use sizeof(arr) to get the total size of the array in bytes. - Use sizeof(arr[0]) to get the size of a single element. - Divide the total size of the array by the size of a single element to obtain the length of the array.