APCSP Unit 4

Value

One piece of information

Numbers

Values made of the digits 0...9, are not required to be listed inside quotation marks

Strings

Values made of any characters, are required to be listed within quotation marks

Operators

Fancy name for + - * /

Expression

Combination of operators and values, evaluates to single value

Variable

Used to store information to be referenced and used by programs, holds one value at a time

Assignment Operator

In programming language, ← or = (Javascript) means "put this value in this variable

Counter Pattern

Used with a variable to count up or down

Concatenation

Used to combine a string with another string or number

Debugging

The process of finding and fixing problems in code (Describe, Hunt, Try, Document)

Global Variable

Permanent. Can be used anywhere in your code.

Local Variable

Temporary. Can be used only in the part of the code where it was created, like inside an onEvent(). Deleted once the onEvent() is done running.

Boolean Value

A value that is either true or false

Conditional

Instructions that depend on whether or not something is true and the thing that is checked is called the condition. Conditionals are especially useful when we want the program to react to situations that change while the program is running.

Boolean Expression

Any expression that evaluates to true or false

Comparison Operator

compares two values and outputs either true or false (>, <, >=, <=, ==, !=)

Logical Operator

A symbol or word used to connect two or more expressions such that the value of the compound expression produced depends only on that of the original expressions and on the meaning of the operator (&&, ||, !)

Truth Table

Used to evaluate the reduced Boolean expression to a single Boolean value

Mod

The remainder that is left after a number is divided by another number

Syntax Error

Code that doesn't follow the rules of the programming language

Logic Error

Code that follows the rules of the programming language but doesn't do what you intend

Function

A named group of programming instructions. Also referred to as a "procedure"

Function Call

A command that executes the code within a function