Returns the exponential of a complex number.

**Sample Usage**

IMEXP("1+i")

IMEXP(C5)

**Syntax**

IMEXP(complex_number)

- complex_number - The complex number whose exponential is to be computed.

**Examples**

c returns the value: 1.46869393991589+2.28735528717884i.

IMEXP(C5) returns the exponential of the complex number contained in C5.

**Notes**

- The exponential of a complex number is defined as follows:
- IMEXP(x+yi) = e
^{x}cos(y) + ie^{x}sin(y)

- IMEXP(x+yi) = e