JavaScript | Math.expm1() function

Math.expm1() is an inbuilt function in JavaScript which is used to get the value of e^p-1, where p is any given number.
The number e is a mathematical constant having an approximate value equal to 2.718.
It was discovered by the Swiss mathematician Jacob Bernoulli.
This number is also called Euler’s number.
Syntax:

Math.expm1(p)

Parameter: This function accepts a single parameter p, which is the parameter and it is any number.

Returns: It return the value of e^p-1, where p is any given number as parameter.

Example:

Input  :Math.expm1(0)
Output : 0

Explanation:
Here the value of parameter p is 0, So after putting the value 0 instead of p in e^p-1
then its value becomes 0.

Let’s see JavaScript program:
Example

<script> 
  // Here different values is being taken as 
  // as parameter of Math.expm1() function. 
  document.write(Math.expm1(0) + "<br>"); 
  document.write(Math.expm1(1) + "<br>"); 
  document.write(Math.expm1(2) + "<br>"); 
  document.write(Math.expm1(-1) + "<br>"); 
  document.write(Math.expm1(5) + "<br>"); 
  document.write(Math.expm1(2.2) + "<br>"); 
  document.write(Math.expm1(-3.2) + "<br>"); 
</script> 

Output:

 0
 1.718281828459045
 6.38905609893065
-0.6321205588285577
 147.4131591025766
 8.025013499434122
-0.9592377960216338

Example 2: Error, here parameter should must be a number otherwise it give error or NaN i.e., not a number.

<script> 
  // Here alphabet parameter give error. 
  document.write(Math.expm1(C)); 
</script> 

Output:

Error: C is not defined

Example 3:

<script> 
  // Here parameter as a string give NaN. 
  document.write(Math.expm1("geeksforgeeks")); 
</script> 

Output:

NaN

Application: Whenever we need to find the value of e^p-1, where p is any given number that time we take the help of Math.expm1() function in JavaScript.

Example:

<script> 
  // Here different numbers are being taken as parameter 
  // from 0 to 9 for Math.expm1() function. 
  for (i = 0; i < 10; i++) { 
      console.log(Math.expm1(i)+ "<br>"); 
  } 
</script> 

Output:

 0
 1.718281828459045
 6.38905609893065
 19.085536923187668
 53.598150033144236
 147.4131591025766
 402.4287934927351
 1095.6331584284585
 2979.9579870417283
 8102.083927575384

Supported Browsers: The browsers supported by JavaScript Math.expm1() function are listed below:

Google Chrome
Internet Explorer
Firefox
Opera
Safari

My Personal Notes

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