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Description

In this tutorial we will be showing a java example on how to use the tanh(double x) method of Math Class. The tanh(double x) returns the hyperbolic tangent of the method argument value. The following are special cases that must be take into consideration: 

• If the argument is NaN, then the result is NaN.
• If the argument is zero, then the result is a zero with the same sign as the argument.
• If the argument is positive infinity, then the result is +1.0.
• If the argument is negative infinity, then the result is -1.0.

Most of the methods of the Math class is static and the tanh() method is no exception. Thus don’t forget that in order to call this method, you don’t have to create a new object instead call it using Math.tanh(x).

Method Syntax

public static double tanh(double x)

Method Argument

Data Type	Parameter	Description
double	x	The number whose hyperbolic tangent is to be returned.

Method Returns

The Math.tanh() method returns the hyperbolic tangent of the argument x.

Compatibility

Requires Java 1.5 and up

Example

Below is a java code demonstrates the use of tanh() method of Math class. The example presented might be simple however it shows the behavior of the tanh() method.

import java.util.Scanner;

/*
 * This example source code demonstrates the use of
 * tanh() method of Math class
 */

public class MathTanh  {

	public static void main(String[] args) {

		// Ask for user input
		System.out.print("Enter a value: ");

		// use scanner to read the console input
		Scanner scan = new Scanner(System.in);

		// Assign the user to String variable
		String s = scan.nextLine();

		// close the scanner object
		scan.close();

		// convert the string input to double
		double value = Double.parseDouble(s);


		// get the hyperbolic tangent of the user input
		double coshValue = Math.tanh(value);
		System.out.println("Hyperbolic Tangent of " + s + " is " + coshValue);

	}

}

output

Enter a value: 45
Hyperbolic Tangent of 45 is 1.0
Press any key to continue . . .

The above java example source code demonstrates the use of tanh() method of Math class. We simply ask for user input and we use the Scanner class to parse it. Since we have used the nextLine() method to get the console value, and the return data type is String thus we have used the Double.parseDouble() to transform it into double. We have to convert it first to double because the tanh() method accepts double method argument.

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