expm1

Returns `exp($num) - 1`, computed in a way that is accurate even when the value of number is close to zero

&reftitle.description; `float` `expm1` `float` `num`

`expm1` returns the equivalent to 'exp(`num`) - 1' computed in a way that is accurate even if the value of `num` is near zero, a case where 'exp (`num`) - 1' would be inaccurate due to subtraction of two numbers that are nearly equal.

&reftitle.parameters;

`num`

- The argument to process

&reftitle.returnvalues;

'e' to the power of `num` minus one

&reftitle.seealso;

- `log1p`
- `exp`