<theory> The meaning of a string in some language, as opposed to syntax which describes how symbols may be combined independent of their meaning.
The semantics of a programming language is a function from programs to answers. A program is a closed term and, in practical languages, an answer is a member of the syntactic category of values. The two main kinds are denotational semantics and operational semantics.
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Nearby terms: SEM « semantic gap « semantic network « semantics » semaphore » semi » Semi-Automatic Ground Environment