expressions

Expressions are fundamental constructs in programming and database languages that represent computations or evaluations. They consist of combinations of values, variables, operators, and functions that yield a result. In SQL, expressions are used to filter records, perform calculations, and manipulate data, while in programming languages like Java, they serve as the primary means for executing calculations and operations. Expressions can take various forms, including arithmetic, boolean, and string expressions, each serving specific purposes within code or queries. Understanding expressions is essential for effective programming and data manipulation, as they form the building blocks of logic and functionality in software development.

Expressions

Codecademy

In MySQL, Expressions are combinations of one or more values, operators, and functions that evaluate to produce a result. Expressions are used in various parts of SQL queries to compute values, filter...

Expressions

Essential Java

Introduction Expressions in Java are the primary construct for doing calculations. Remarks For a reference on the operators that can be used in expressions, see Operators .

Details of Expressions

Introduction to Programming Using Java

Section 2.5 Details of Expressions T his section takes a closer look at expressions. Recall that an expression is a piece of program code that represents or computes a value. An expression can be a li...

Expressions, Statements and Blocks

Learn Java

Expressions An expression is a construct made up of variables, operators, and method invocations, which are constructed according to the syntax of the language, that evaluates to a single value. You ...

Expressions

Essential Java

Within JShell, you can evaluate Java expressions, with or without semicolons. These can range from basic expressions and statements to more complex ones: jshell 4+2 jshell System.out.printf("I am %d y...

Operators and Expressions

A Byte of Python

Operators and Expressions Most statements (logical lines) that you write will contain expressions . A simple example of an expression is 2 + 3 . An expression can be broken down into operators and op...

Introducing DAX — Data Analysis Expressions

Towards Data Science

Data Analysis Expressions are a collection of functions that can be used to perform a task and return one or more values. Although this sounds very similar to any other programming language, DAX is…

Function expressions

Javascript.info

In JavaScript, a function is not a “magical language structure”, but a special kind of value. The syntax that we used before is called a Function Declaration : function sayHi() { alert( "Hello" ); } T...

Variables and Expressions

Arcade Academy

Video: https://youtu.be/K1Lp6uqb5QE Slides: https://slides.com/paulcraven/deck We’ve learned how to import a library and call functions. The next step is to make our code more flexible. What if we co...

JavaScript Basics: Expressions and Statements

Level Up Coding

In JavaScript or any programming language in general, you know that you create a value and apply operators to them to get a new value. A fragment of code that produces a value is an expression…

Statements

Codecademy

In JavaScript, statements are instructions that are executed by the browser or Node.js. A statement can be a simple or complex operation that performs an action, such as assigning a value to a variabl...

2. Variables, expressions and statements

How to Think Like a Computer Scientist

2. Variables, expressions and statements 2.1. Values and data types A value is one of the fundamental things — like a letter or a number — that a program manipulates. The values we have seen so far ar...