Ma'anar ƙamus na kalmar "arity" tana nufin adadin gardama ko operands waɗanda aikin lissafi ko na hankali ko aiki ke ɗauka. A cikin shirye-shiryen kwamfuta, ana amfani da arity don bayyana adadin sigogi ko gardama waɗanda wani aiki ko subroutine zai iya karɓa. Ana yawan amfani da kalmar a mahallin shirye-shiryen harsuna, kamar a cikin bayanin samfuran ayyuka ko ƙayyadaddun sigogi a cikin kiran aiki. Ƙididdigar aiki ko aiki yawanci ana nuna su ta hanyar biyan kuɗi, kamar unary (arity 1), binary (arity 2), ternary (arity 3), da sauransu.