#### Examples.

- An integer n in ℤ/13ℤ
  n:=12%13.
- a vector V in ℤ/13ℤ
  V:=[1,2,3]%13 or V:=[1%13,2%13,3%13].
- a matrix A in ℤ/13ℤ
  A:=[[1,2,3],[2,3,4]]%13 or
  A:=[[1%13,2%13,3%13],[[2%13,3%13,4%13]].
- a polynomial A in ℤ/13ℤ[x] in symbolic representation
  A:=(2*x^2+3*x-1)%13 or
  A:=2%13*x^2+3%13*x-1%13.
- a polynomial A in ℤ/13ℤ[x] in list representation
  A:=poly1[1,2,3]%13 or A:=poly1[1%13,2%13,3%13].

To recover an object o with integer coefficients instead of modular coefficients, input o % 0. For example:
Input:

o:=4%7;:
o%0

Output:

−3

Remark. Most Xcas functions that work on integers or polynomials with integer coefficients will often work the same on ℤ/pℤ or ℤ/pℤ[x], with the obvious exception that the input and output will be modular. They will be listed in the remaining subsections. For some commands in ℤ/pℤ or in ℤ/pℤ[x], p must be a prime integer.

- In Maple mode, integers modulo p are represented like usual integers instead of using specific modular integers. To avoid confusion with normal commands, modular commands are written with a capital letter (inert form) and followed by the mod command.

  The Maple commands will be discussed in Section 5.35.