In computer programming, a variable is an abstract storage location paired with an associated symbolic name, which contains some known or unknown quantity of information referred to as a value; or in simpler terms, a variable is a named container for a particular set of bits or type of data (like integer, float, string etc...). A variable can eventually be associated with or identified by a memory address. The variable name is the usual way to reference the stored value, in addition to referring to the variable itself, depending on the context. This separation of name and content allows the name to be used independently of the exact information it represents. The identifier in computer source code can be bound to a value during run time, and the value of the variable may thus change during the course of program execution. Variables in programming may not directly correspond to the concept of variables in mathematics. The latter is abstract, having no reference to a physical object such as storage location. The value of a computing variable is not necessarily part of an equation or formula as in mathematics. Variables in computer programming are frequently given long names to make them relatively descriptive of their use, whereas variables in mathematics often have terse, one- or two-character names for brevity in transcription and manipulation. A variable's storage location may be referenced by several different identifiers, a situation known as aliasing. Assigning a value to the variable using one of the identifiers will change the value that can be accessed through the other identifiers. Compilers have to replace variables' symbolic names with the actual locations of the data. While a variable's name, type, and location often remain fixed, the data stored in the location may be changed during program execution. (Wikipedia).
Intro to a Variable as a Changing Value or Placeholder
This video defines a variable and provides examples of a variable used as a changing value or a placeholder http://mathispower4u.com
From playlist Algebraic Structures Module
Python Programming 2. Variables
This is the second in a course of computer science video lessons introducing programming with Python. It introduces the use of variables. A variable is a named location in the computers memory that can temporarily store a value and whose contents can change while a program is running. Yo
From playlist GCSE Computer Science
From playlist Week 2 2015 Shorts
Coefficient, Constant, Variable & Exponents | Algebra | Maths | FuseSchool
Equations are used everywhere: in computers, business, internet searches, medicine to name a few examples. Which is why we study them a lot in Maths. We have names to describe the different parts: coefficients, variables, constants and exponents. A variable is a symbol for a number we do
From playlist MATHS
More videos like this online at http://www.theurbanpenguin.com Understanding variable scope in Java. We take a quick look at Class, Instance and Local variables and see how scope affects their access.
From playlist Java
VARIABLES in Statistical Research (2-1)
A variable is any characteristic that can vary. An organized collection of numbers can be a variable. Qualitative variables indicate an attribute or belongingness to a category. Dichotomous variables are discrete variables that can have two and only two values. Quantitative variables indic
From playlist Forming Variables for Statistics & Statistical Software (WK 2 - QBA 237)
Classify a polynomial then determining if it is a polynomial or not
👉 Learn how to determine whether a given equation is a polynomial or not. A polynomial function or equation is the sum of one or more terms where each term is either a number, or a number times the independent variable raised to a positive integer exponent. A polynomial equation of functio
From playlist Is it a polynomial or not?
Is it a polynomial with two variables
👉 Learn how to determine whether a given equation is a polynomial or not. A polynomial function or equation is the sum of one or more terms where each term is either a number, or a number times the independent variable raised to a positive integer exponent. A polynomial equation of functio
From playlist Is it a polynomial or not?
Constraint-Satisfaction Problems in Python
Author David Kopec discusses Constraint-Satisfaction Problems in Python. To learn more, see David's book Classic Computer Science Problems in Python | http://mng.bz/opAp Use the discount code TWITKOPE40 for 40% off of any Manning title. A large number of problems which computational too
From playlist Python
Introduction to Programming and Computer Science - Full Course
In this course, you will learn basics of computer programming and computer science. The concepts you learn apply to any and all programming languages and will be a good base onto which you can build your skills. This video is meant for those who are interested in computer science and pro
From playlist Computer Science Concepts
An Introduction to Programming
Welcome to An Introduction to Programming. In this lecture-style series, we will be taking you through the basics of computer science and giving you the tools required to delve into any programming language you would like to learn. This video hopes to give you a good base onto which you ca
From playlist Software Development
Shadows of Computation - Lecture 5 - What is Computation?
Welcome to Shadows of Computation, an online course taught by Will Troiani and Billy Snikkers, covering the foundations of category theory and how it is used by computer scientists to abstract computing systems to reveal their intrinsic mathematical properties. In the fifth lecture Will sp
From playlist Shadows of Computation
Array Variables - Introduction
This video introduces array variables. It defines an array variable as a named group of contiguous memory locations, each element of which can be accessed by means of an index number. It explains the difference between one dimensional and two dimensional arrays, and covers how these can
From playlist Data Structures
Gilles Dowek : Des nombres aux arbres : comment varier ses exemples d'algorithmes ?
Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b
From playlist Mathematical Aspects of Computer Science
How to Program | Computer Science & Python Coding for Beginners | Variables: Operations/Input/Output
Learning a new language opens a wealth of opportunities. But there’s one language family that provides benefits like no other: the languages of computer programming. Now widely taught in schools, programming is an eminently learnable skill that gives you unrivalled problem-solving power yo
From playlist Science
2 History and Cognition Basics
Recorded: Spring 2014 Lecturer: Dr. Erin M. Buchanan Materials: created for Memory and Cognition (PSY 422) using Smith and Kosslyn (2006) Lecture materials and assignments available at statisticsofdoom.com. https://statisticsofdoom.com/page/other-courses/
From playlist PSY 422 Memory and Cognition with Dr. B
DSI | Diagrammatic Differential Equations in Physics Modeling and Simulation
Abstract: I’ll discuss some results from a recent paper on applying categories of diagrams for specifying multiphysics models for PDE-based simulations. We developed a graphical formalism inspired by the graphical approach to physics pioneered by the late Enzo Tonti. We will discuss the gr
From playlist DSI Virtual Seminar Series
Python for Bioinformatics - Drug Discovery Using Machine Learning and Data Analysis
Learn how to use Python and machine learning to build a bioinformatics project for drug discovery. ✏️ Course developed by Chanin Nantasenamat (aka Data Professor). Check out his YouTube channels for more bioinformatics and data science tutorials: https://www.youtube.com/dataprofessor/ and
From playlist Data Science
From playlist Week 1 2015 Shorts