# 
#  Overview
The `fmax()` function in C++ is used to return the larger number among two arguments (`x` and `y`) passed to the function.

The `fmax()` function is defined in the `<cmath>` header file.
##
## Syntax

double fmax (double x, double y);
float fmax (float x, float y);
long double fmax (long double x, long double y);

## Parameter value
The `fmax()` function takes two parameter values, `x` and `y`, which represent the first and second arguments of the function, respectively.

## Return value
The `fmax()` function returns the larger value among the `x` and `y` values.

## Example



#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    double x = -2.05, y = -3.5, result;

    result = fmax(x, y);
    cout << "fmax(x, y) = " << result << endl;

    return 0;
}

# 
## Code explanation
We can see from the code above that the `fmax()` function correctly returned `-2.05` as the larger value when compared to `-3.5`.

## Using different types of argument
We can also use the `fmax()` function to compute for the larger number between arguments of different data types, such as a `double` and an `int`.

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
  // using different argument types
    double x = 89.1, result;
    int y = 89;
    
    result = fmax(x, y);
    cout << "fmax(89.1, 89) = " << result << endl;

    return 0;
}

## Code explanation
We can see from the code above that the `fmax()` correctly returned the `double`  (`89.1`) as the larger value when compared to the `int` (`89`).

What is the fmax() function in C++?

The fmax() function in C++ returns the larger of two arguments, x and y, including mixed data types.