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

• Difficulty Level : Basic
• Last Updated : 26 Apr, 2020

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

Example:

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```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);`` ` `    ``// 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
```
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