In this C++ tutorial, you will learn how to find the hyperbolic tangent of an angle using floor() function of cmath, with syntax and examples.

## C++ tanh()

C++ tanh() returns hyperbolic tangent of angle given in radians.

## Syntax

The syntax of C++ tanh() is

`tanh(x)`

where

Returns

The return value depends on the type of value passed for parameter x.

The return value of tanh(x) is

• double if x is double.
• float if x is float.
• long double if x is long double.

The synopsis of tanh() function is

```double tanh(double x);
float tanh(float x);
long double tanh(long double x);
double tanh(T x); // For integral type```

tanh() is a function of cmath library. Include cmath library in the program, if using tanh() function.

## Example

In this example, we read the value of angle from user into variable x, and find the hyperbolic tangent value of x using tanh() function.

C++ Program

```#include <iostream>
#include<cmath>
using namespace std;

int main() {
double x;
cout << "Enter angle (radians) : ";
cin >> x;

double result = sinh(x);
cout << "tanh(" << x << ") : " << result << endl;
}```

Output

```Enter angle (radians) : 5
tanh(5) : 74.2032
Program ended with exit code: 0```
```Enter angle (radians) : 0
tanh(0) : 0
Program ended with exit code: 0```
```Enter angle (radians) : -2
tanh(-2) : -3.62686
Program ended with exit code: 0```

## Conclusion

In this C++ Tutorial, we learned the syntax of C++ tanh(), and how to use this function to find the hyperbolic tangent of given angle, with the help of examples.