Returns the square root of a complex number.

**Sample Usage**

IMSQRT("1+i")

IMSQRT(C5)

**Syntax**

IMSQRT(complex_number)

- complex_number - The complex number whose square root is to be computed.

**Examples**

IMSQRT("1+i") returns the value: 1.09868411346781+0.455089860562227i.

IMSQRT(C5) returns the square root of the complex number contained in C5.