Returns e raised to the power of the argument minus 1. For small magnitudes of x
expm1(x) may be more accurate than
The number e, also known as Euler’s number, is a mathematical constant approximately equal to 2.71828 and the base of the natural logarithm.
cmath library must be added to the top of the file with
Returns eⁿ - 1:
expm1() to return the value of e³-1:
double result;result = std::expm1(3);
expm1() to return the value of e-1 (e¹-1):