What is the tanh() function in Swift?

Overview

The tanh() function in Swift returns a number’s hyperbolic tangent.

Below is the mathematical representation of the tanh() function:

Mathematical representation of the hyperbolic tangent function

Note: We need to import Foundation in our code to use the tanh() function. We can import it like this: import Foundation.

Syntax

tanh(num)

Parameter

This function requires a number representing an angle in radians as a parameter.

To convert degrees to radians, use:

radians = degrees * ( pi / 180.0 )

Return value

This function returns the hyperbolic tangent of a number sent as a parameter.

Example

The code below shows the use of the tanh() function in Swift:

import Swift
import Foundation
//positive number in radians
print("The value of tanh(2.3) :", tanh(2.3));
// negative number in radians
print("The value of tanh(-2.3) :", tanh(-2.3));
//converting the degrees angle into radians and then applying tanh()
// degrees = 45.0
// PI = 3.14159265
print("The value of tanh(45.0 * (PI / 180.0)) :", tanh(45.0 * (Double.pi / 180.0)));

Explanation

  • Line 2: We add the Foundation header required for tanh() function.
  • Line 5: We calculate the hyperbolic tangent of the positive number in radians using tanh().
  • Line 8: We calculate the hyperbolic tangent of the negative number in radians using tanh().
  • Line 13: We converted the angle in degrees to radians and then calculated its hyperbolic tangent using tanh().

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