JavaScript | Math.tanh() function

The Math.tanh() is an inbuilt function in JavaScript which is used to calculate the value of hyperbolic tangent of a number.
Syntax:

Math.tanh(p)

Parameter: This function accepts a single parameter p which is a number for which the value of hyperbolic tangent is going to be calculated.

Return value: It returns the calculated value of the hyperbolic tangent of the number.

Examples:

Input :Math.tanh(0)
Output:0

Explanation:
Here formula for calculating hyperbolic tangent of any number is : The number e is a mathematical constant having an approximate value equal to 2.718.
$tanh(p) = sinh(p)/cosh(p) = e^p-e^-p/e^p+e^-p = e^0-e^-0/e^0+e^-0 = 0$
In the same way hyperbolic tangent of any number can be calculated just after replacing p with the desired number.

Input :Math.tanh(18)
Output:0.9999999999999996

Explanation:
Here same as above calculation, when we put 18 instead of p then the value becomes as output shown above.
Let’s see some JavaScript code:

Example 1:

<script> 
  // Printing hyperbolic tangent of some numbers 
  // taken as parameter of Math.tanh() function. 
  document.write(Math.tanh(0)); 
  document.write(Math.tanh(1)); 
  document.write(Math.tanh(5)); 
  document.write(Math.tanh(22)); 
  document.write(Math.tanh(-2)); 
  document.write(Math.tanh(4)); 
</script> 

Output:

0
0.7615941559557649
0.9999092042625951
1
-0.9640275800758169
0.999329299739067

Example 2: It is an error case because complex number can not be taken as the parameter of the function only integer value can be taken as the parameter.
<script>

// complex number can not be calculated as the hyperbolic tangent.

documnet.write(Math.tanh(1 + 2i));

</script>
Output:
```
Error: Invalid or unexpected token
```

Example 3: Other than integer nothing is accepted as the parameter of the function that is why here string as the parameter gives NaN i.e, not a number.

<script> 
  // Any string value as the parameter of the function 
  // gives NaN i.e, not a number 
  // because only number can be used as the parameters. 
  document.write(Math.tanh("geeksforgeeks")); 
  document.write(Math.tanh("gfg")); 
</scrippt> 

Output:

NaN
NaN

Application: Its practical application is that whenever we need to find the value of the hyperbolic tangent of a number that time we take the help of Math.tanh() function in JavaScript.

Example:

<script> 
  // Printing hyperbolic tangent of some  
  //numbers from 0 to 9 
  // taken as parameter of Math.tanh() function. 
  for (i = 0; i < 10; i++) 
  { 
     document.write(Math.tanh(i) + "<br>"); 
  } 

Output:

0
0.7615941559557649
0.9640275800758169
0.9950547536867305
0.999329299739067
0.9999092042625951
0.9999877116507956
0.9999983369439447
0.9999997749296758
0.999999969540041

Supported Browsers: The browsers supported by JavaScript Math.tanh() function are listed below:

Google Chrome
Internet Explorer
Firefox
Opera
Safari

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