ekspressioon

Ekspressioon is a term used in many languages to denote an expression: a symbolic sequence that denotes a value, meaning, or effect. In mathematics and computer science, ekspressioon refers to a combination of symbols—such as constants, variables, operators, and functions—that can be evaluated or interpreted to yield a value. Expressions can be simple or complex and may form part of larger constructs such as equations or program code.

In mathematics, an ekspressioon consists of operands and operators that combine to form a value. Examples include 3 + 4, x^2 + 7x − 1, or sin(π/2). Grouping with parentheses determines the order of evaluation. Expressions can often be simplified, expanded, or factored, and two expressions are considered equivalent if they produce the same value for all permissible substitutions of variables.

In programming and computer science, an ekspressioon is a sequence that evaluates to a value and can appear wherever a value is required. This category includes arithmetic expressions, logical expressions, and function calls. Some languages distinguish expressions from statements, with statements performing actions and expressions yielding values. Expressions can be nested and combined with assignment or higher-order constructs to form more complex programs.

Key concepts associated with ekspressioon include evaluation, type, precedence, and associativity, which govern how expressions are parsed and executed. Understanding ekspressioon is fundamental for performing calculations, writing code, and analyzing mathematical models. See also: equation, formula, term, operator, function.