# How to reverse a Vector using STL in C++?

Given a vector, reverse this vector using STL in C++.

Example:

```Input: vec = {1, 45, 54, 71, 76, 12}
Output: {12, 76, 71, 54, 45, 1}

Input: vec = {1, 7, 5, 4, 6, 12}
Output: {12, 6, 4, 5, 7, 1}
```

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

Syntax:

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

 `// C++ program to reverse Vector ` `// using reverse() in STL ` ` `  `#include ` `using` `namespace` `std; ` ` `  `int` `main() ` `{ ` ` `  `    ``// Get the vector ` `    ``vector<``int``> a = { 1, 45, 54, 71, 76, 12 }; ` ` `  `    ``// Print the vector ` `    ``cout << ``"Vector: "``; ` `    ``for` `(``int` `i = 0; i < a.size(); i++) ` `        ``cout << a[i] << ``" "``; ` `    ``cout << endl; ` ` `  `    ``// Reverse the vector ` `    ``reverse(a.begin(), a.end()); ` ` `  `    ``// Print the reversed vector ` `    ``cout << ``"Reversed Vector: "``; ` `    ``for` `(``int` `i = 0; i < a.size(); i++) ` `        ``cout << a[i] << ``" "``; ` `    ``cout << endl; ` ` `  `    ``return` `0; ` `} `

Output:

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

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