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)

Paramter:

• Here p is the parameter and it is any number.

Return Value:

• 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:

Output:

 0
 1.718281828459045
 6.38905609893065
-0.6321205588285577
 147.4131591025766
 8.025013499434122
-0.9592377960216338

Error Or NaN:

• Here parameter should must be a number otherwise it give error or NaN i.e, not a number.
  Code #1:

  // Here alphabet parameter give error. console.log(Math.expm1(C));

  Output:

  Error: C is not defined

• Code #2:

  // Here parameter as a string give NaN. console.log(Math.expm1("geeksforgeeks"));

  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.

  // 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>"; }

  Output:

   0
   1.718281828459045
   6.38905609893065
   19.085536923187668
   53.598150033144236
   147.4131591025766
   402.4287934927351
   1095.6331584284585
   2979.9579870417283
   8102.083927575384