Typing environment

In type theory a typing environment (or typing context) represents the association between variable names and data types.

More formally an environment is a set or ordered list of pairs , usually written as , where is a variable and its type.

The judgement

is read as " has type in context ".[1]

In statically typed programming languages these environments are used and maintained by type rules to type check a given program or expression.

See alsoEdit


  1. ^ "Simply Typed λ-calculus" (PDF).