%z A variable used to define polynomials.

## Syntax

    %z

## Description

`%z` is the polynomial in the complex cases by default, `z = poly(0, "z")`. This variable is used to create polynomials.

## Example

            p = %z^2 + 2 * %i *%z -1
            roots(p)
            coeff(p)

            z = poly(0, "z");
            p1 = z^2 + 2*%i*z -1
            roots(p1)
            coeff(p1)

## See also

- poly
- coeff
- roots