are used to store information in the computer's memory or a database that can be used in a program when executing a program. Variables, then, are like storage containers. Variables help a program work more efficiently.

A single letter or symbol

A sequence of characters, numbers or symbols

Whole numbers that do not contain a decimal

Numbers that contain a decimal

Used to store the results of a comparison, such as: a > b, x <= y, z == 14

contain a combination of variables, values, functions and operators, which are evaluated and produce another value. This is similar to the expressions used in math.

are the mathematical symbols that we use every day and expressions are evaluated using the mathematical order of precedence

check for a specific condition

compare values

is a programming language model organized around objects rather than actions and data rather than logic. It relies on defining classes, objects, instances, methods and properties.

defined as components that are associated with a certain object.

are the various characteristics of an object, such as size, color and type.

are actions that a class can do; but, are not part of the class description.

the value that is passed to a method when it is called so that it knows what to do.

is the variable that holds the argument data (value) needed by the method.

is an action that takes place while a program is running, such as a mouse click or the pressing of a key.

is the code that is called when an event occurs.

instance

sprites

a variable defined in a class that represents an attribute of an object

a quality or characteristic belonging to or associated with with an object

means to merge 2 or more variables into a

methods and functions

event

event handlers

function

the equal sign (=); any value to the right of the assignment operator is assigned to, or taken on by, the variable to the left.

include + addition, - subtraction, * multiplication, / division, and % modulus. These operators are used to perform basic mathematical tasks.

<, >, <=, >=, ==, != indicate a Boolean expression and are symbols that are used to evaluate data in the field to determine if it is the same (=), greater than (>), less than (<), NOT equal to(!=), IS equal to(==), or in between a range of values as specified by the criteria.

enable you to combine logical expressions. AND(&&), OR(||), and NOT (!)

Comparative Boolean and Conditional Boolean

Compare values and is often used in repetition and selection structures.

Check for a specific condition (true or false) and is often used in repetition and selection structures.

declaring a variable

initializing

expressions