The Math.expm1()
function returns ex - 1
, where x
is the argument, and e the base of the natural logarithms.
Math.expm1(x)
x
Because expm1()
is a static method of Math
, you always use it as Math.expm1()
, rather than as a method of a Math
object you created (Math
is not a constructor).
Math.expm1()
Math.expm1(-1); // -0.6321205588285577 Math.expm1(0); // 0 Math.expm1(1); // 1.718281828459045
This can be emulated with the help of the Math.exp() function:
Math.expm1 = Math.expm1 || function(x) { return Math.exp(x) - 1; };
Created by Mozilla Contributors, license: CC-BY-SA 2.5