In computer science language, "expression," "predicate," and "statement" are terms often used to describe different constructs in programming languages. Here's a brief explanation of each:
Expression:
An expression is a combination of values, variables, operators, and function calls that can be evaluated to produce a single value.
Expressions can be simple, like a literal value or a variable, or complex, involving arithmetic or logical operations.
Examples: 5 + 3, x * y, isReady && hasPermission, Math.sqrt(16).
Predicate:
A predicate is **a specific type of expression ** that evaluates to either true or false (also produce a single value). Predicates are commonly used in conditional statements and loops to make decisions based on whether a condition is true or false. Examples: x > 0 (evaluates to true or false based on whether x is greater than 0), isReady && hasPermission, name === "John".
Statement:
A statement is a complete instruction that performs a specific action. Unlike expressions, statements don't necessarily produce a value. They are executed for their side effects. Examples: variable declarations (let x = 5;), control flow statements (if, else, for, while), function declarations (function myFunction() ).
an expression is a combination of values and operators that evaluates to a single value, a predicate is a specific type of expression that evaluates to true or false, and a statement is a complete instruction that performs an action. In many programming languages, expressions can be used as part of statements, and predicates are often used to control the flow of statements.