%s A variable used to define polynomials.

## Syntax

    %s

## Description

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

## Example

            p = %s^2 + 2 * %s +1
            roots(p)
            coeff(p)

            s = poly(0, "s");
            p1 = s^2 + 2*s +1
            roots(p1)
            coeff(p1)

## See also

- poly
- coeff
- roots