Ring matematika, aritmatika modular inggih punika sistem aritmatika antuk wilangan bulat, sané angkan-angkanyané "malincer mabalik" rikala nyujur pikolih tertentu sané kawastanin modulus.
Modular arithmetic is a system of arithmetic for integers, sometimes referred to as clock arithmetic, where numbers "wrap around" after they reach a certain value (the modulus).