# expm1

expm1(x)

Accurately compute \$e^x-1\$.

## Examples

In the Julia programming language, the function `expm1(x)` is used to accurately compute the value of `e^x - 1`.

``````julia> expm1(1)
1.718281828459045

julia> expm1(0)
0.0

julia> expm1(-1)
-0.6321205588285577``````

Here are some common examples of how to use the `expm1` function:

1. Calculate the exponential minus one for a positive number:

``````julia> expm1(2)
6.38905609893065``````

This example computes the value of `e^2 - 1`.

2. Compute the exponential minus one for zero:

``````julia> expm1(0)
0.0``````

It returns `0.0` since `e^0 - 1` is zero.

3. Calculate the exponential minus one for a negative number:
``````julia> expm1(-0.5)
-0.3934693402873666``````

This example computes the value of `e^(-0.5) - 1`.

Common mistake example:

``````julia> expm1("hello")
ERROR: MethodError: no method matching expm1(::String)``````

In this example, the input to the `expm1` function is a string instead of a number. This function only works with numerical inputs, so ensure that the argument passed is a valid numeric value.