In programming, arrays are a collection of elements of the same data type. It is often necessary to determine the length of an array to perform various operations on it.

In C++, we can use a function to find the length of an array. In this tutorial, we will learn how to find the length of an array in C++ using a function.

## Steps:

1. Declare the array that you want to find the length of.

2. Write a function to find the length of the array.

3. Call the function and pass the array as a parameter.

4. Display the length of the array.

Here is the code to find the length of an array in C++ using a function:

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#include <iostream> using namespace std; int findLength(int arr[], int size){ int length = sizeof(arr)/sizeof(arr[0]); return length; } int main(){ int arr[] = {1,2,3,4,5}; int size = sizeof(arr)/sizeof(arr[0]); int length = findLength(arr, size); cout << "The length of the array is: " << length << endl; return 0; } |

## Output:

The length of the array is: 2

## Conclusion:

In this tutorial, we have learned how to find the length of an array in C++ using a function. We used the sizeof() function to determine the size of the array and divided by the size of the data type to get the length of the array.