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The C math tanh() function is used to return hyperbolic tangent of a value. The hyperbolic tangent of x is defined as:

tanh

where e is an Euler's number.

Syntax

double tanh(double x);
float tanhf(float x);
long double tanhl(long double x);

Parameters

x Specify the value.

Return Value

Returns the hyperbolic tangent of a value.

Example:

In the below example, tanh() function is used to find out the hyperbolic tangent of a value.

#include <stdio.h>
#include <math.h>
 
int main (){
  printf("%lf\n", tanh(0));
  printf("%lf\n", tanh(2));
  printf("%lf\n", tanh(4));
  return 0;
}

The output of the above code will be:

0.000000
0.964028
0.999329

❮ C <math.h> Library