Programming Language Semantics refers to the study of the meaning behind the constructs of programming languages. It focuses on how different statements and expressions in a language translate into actions or results when executed. Understanding semantics helps programmers predict the behavior of their code and ensures that it functions as intended. There are several approaches to defining semantics, including operational semantics, which describes how programs execute on a machine, and denotational semantics, which maps programs to mathematical objects. These frameworks provide a foundation for analyzing and reasoning about programs, making it easier to develop reliable software.