# std::minmax() function with example in C++ STL

C++ STL | std::minmax() function: Here, we are going to learn about the minmax() function of algorithm header in C++ STL with example.
Submitted by IncludeHelp, on May 20, 2019

## C++ STL std::minmax() function

minmax() function is a library function of algorithm header, it is used to find the smallest and largest values, it accepts two values and returns a pair of the smallest and largest values, the first element of the pair contains the smallest value and the second element of the pair contains the largest value.

Note:To use minmax() function – include <algorithm> header or you can simple use <bits/stdc++.h> header file.

Syntax of std::minmax() function

```    std::minmax(const T& a, const T& b);
```

Parameter(s): const T& a, const T& b – values to be compared.

Return value: pair – it returns the pair of the smallest and the largest values.

Example:

```    Input:
int a = 10;
int b = 20;

//finding pair of smallest and largest numbet
auto result = minmax(a, b);

cout << result.first << endl;
cout << result.second << endl;

Output:
10
20
```

## C++ STL program to demonstrate use of std::minmax() function

In this program, we have two integer variables and finding the smallest and the largest values.

```//C++ STL program to demonstrate use of
//std::minmax() function
#include <iostream>
#include <algorithm>
using namespace std;

int main()
{
int a = -10;
int b = -20;

//finding pair of smallest and largest numbet
auto result = minmax(a, b);

//printing the smallest and largest values
cout << "smallest number is: " << result.first << endl;
cout << "largest number is: " << result.second << endl;

return 0;
}
```

Output

```smallest number is: -20
largest number is: -10
```

Reference: C++ std::minmax()