exp x
This calls Python's built-in math.exp function, which computes the exponential of x.
math.exp
i1 : exp toPython 1 o1 = 2.718281828459045 o1 : PythonObject of class float
i2 : exp toPython 0 o2 = 1.0 o2 : PythonObject of class float
The source of this document is in Python/doc/exp-log.m2:27:0.