# How to reverse an Array using STL in C++?

Given an array arr[], reverse this array using STL in C++.

Example:

```Input: arr[] = {1, 45, 54, 71, 76, 12}
Output: {12, 76, 71, 54, 45, 1}

Input: arr[] = {1, 7, 5, 4, 6, 12}
Output: {12, 6, 4, 5, 7, 1}
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach: Reversing can be done with the help of reverse() function provided in STL.

Syntax:

```reverse(start_index, last_index);
```

 `// C++ program to reverse Array ` `// using reverse() in STL ` ` `  `#include ` `#include ` `using` `namespace` `std; ` ` `  `int` `main() ` `{ ` `    ``// Get the array ` `    ``int` `arr[] = { 1, 45, 54, 71, 76, 12 }; ` ` `  `    ``// Compute the sizes ` `    ``int` `n = ``sizeof``(arr) / ``sizeof``(arr[0]); ` ` `  `    ``// Print the array ` `    ``cout << ``"Array: "``; ` `    ``for` `(``int` `i = 0; i < n; i++) ` `        ``cout << arr[i] << ``" "``; ` ` `  `    ``// Reverse the array ` `    ``reverse(arr, arr + n); ` ` `  `    ``// Print the reversed array ` `    ``cout << ``"\nReversed Array: "``; ` `    ``for` `(``int` `i = 0; i < n; i++) ` `        ``cout << arr[i] << ``" "``; ` `    ``return` `0; ` `} `

Output:

```Array: 1 45 54 71 76 12
Reversed Array: 12 76 71 54 45 1
```

Rated as one of the most sought after skills in the industry, own the basics of coding with our C++ STL Course and master the very concepts by intense problem-solving.

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : gufideg

Article Tags :
Practice Tags :

6

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.