An expression is a sequence of variables and literals, punctuated by operators. A literal is an explicit data value, such as 1 for an integer or 2.1 for a floating-point number. Literals are often used to assign a value to a variable.

An expression followed by a semicolon (;) is called a statement. Statements range in complexity from simple expressions to blocks of statements that accomplish a sequence of actions. Flow-control statements determine the order statements are executed.

A statement block also indicates subscope. Variables declared within a statement block are only recognized within the block. HLSL statements determine the order in which expressions are evaluated. Each expression can be one of the following.

Related topics

Statements (DirectX HLSL)