JavaScript(JS) math method - expm1

The expm1 method in JavaScript's Math object returns the value of the constant e raised to the power of a given number minus 1.

The constant e is the base of the natural logarithm, and its approximate value is 2.718281828459045.

The expm1 method takes one argument, which is the exponent to which e is raised. If the argument is not a number, it will be converted to one before the calculation. If the argument is NaN, NaN will be returned.

Here's an example usage:

const x = 2;
const expm1X = Math.expm1(x);
console.log(expm1X); // 6.3890560989306495

In the above example, the Math.expm1 method is used to calculate the value of e raised to the power of 2 minus 1. The result, which is approximately 6.3890560989306495, is then logged to the console.