Syntax
The appearance of statements shapes the look of programs. Programming languages are characterized by the flavor of statements they use (e.g.: The curly brace language family). Many statements are introduced by identifiers like if, while or repeat. Often statement keywords are reserved such that they cannot be used as names of variables or functions. Imperative languages typically use special syntax for each statement, which looks quite different to function calls. Common methods to describe the syntax of statements are Backus–Naur Form and syntax diagrams.
Read more about this topic: Statement (computer Science)