▁in ▁program ▁development . ▁For ▁example , ▁intellig ent ▁program ▁text ▁completion ▁may ▁rely ▁on ▁existing ▁type ▁information ▁to ▁suggest ▁type - safe ▁code ▁fragments ▁to ▁add ▁to ▁the ▁current ▁program ▁text . ▁In ▁programming ▁languages , ▁such ▁as ▁Scala , ▁implicit ▁convers ions ▁synth es ize ▁program ▁text ▁converting ▁objects ▁of ▁one ▁type ▁into ▁objects ▁of ▁a ▁different ▁type ▁based ▁on ▁type ▁information . ▁More ▁generally , ▁in ▁program ▁synth esis ▁( the ▁computational ▁counter part ▁of ) ▁type ▁inhab itation ▁can ▁be ▁used ▁to ▁construct ▁( parts ▁of ) ▁programs ▁from ▁specification ▁given ▁in ▁form ▁of ▁type ▁information . ▁ ▁Un ified ▁type ▁system ▁ ▁Some ▁languages ▁like ▁C # ▁or ▁Scala ▁have ▁a ▁un ified ▁type ▁system . ▁This ▁means ▁that ▁all ▁C # ▁types ▁including ▁primitive ▁types ▁inherit ▁from ▁a ▁single ▁root ▁object . ▁Every ▁type ▁in ▁C # ▁inher its ▁from ▁the ▁Object ▁class . ▁Some ▁languages , ▁like ▁Java ▁and ▁R aku , ▁have ▁a ▁root ▁type ▁but ▁also ▁have ▁primitive ▁types ▁that ▁are ▁not ▁objects . ▁Java ▁provides ▁wrapper ▁object ▁types ▁that ▁exist ▁together ▁with ▁the ▁primitive ▁types ▁so ▁developers ▁can ▁use ▁either ▁the ▁wrapper ▁object ▁types ▁or ▁the ▁simpler ▁non - object ▁primitive ▁types . ▁R aku ▁automatically ▁converts ▁primitive ▁types ▁to ▁objects ▁when ▁their ▁methods ▁are ▁accessed . ▁ ▁Comp at ibility : ▁equivalence ▁and ▁sub ty ping ▁ ▁A ▁type ▁check er ▁for ▁a ▁stat ically ▁typed ▁language ▁must ▁verify ▁that ▁the ▁type ▁of ▁any ▁expression ▁is ▁consistent ▁with ▁the ▁type ▁expected ▁by